| Nominal Species (n = 1535) | Present allocation (n = 2) | Ref. |
|---|---|---|
| Bryconamericus abalio Román-Valencia, Ruiz-C. & Taphorn 2023 | Genus Species | 123477 |
| Phoxinus abanticus Turan, Bayçelebi, Özuluğ, Gaygusuz & Aksu 2023 | Genus Species | 123477 |
| Hypergastromyzon abditus Tan, 2021 | Genus Species | 123477 |
| Butis abdoui Keith & Mennesson 2023 | Genus Species | 123477 |
| Benthophilus abdurahmanovi Ragimov, 1978 | Genus Species | |
| Opistognathus abei Fujiwara & Ikeda 2024 | Genus Species | 123477 |
| Catoprion absconditus Mateussi, Melo & Oliveira, 2020 | Genus Species | |
| Moenkhausia abyss Oliveira & Marinho, 2016 | Genus Species | |
| Osteodiscus abyssicola Murasaki, Kai, Endo & Fukui, 2021 | Genus Species | 123477 |
| Corumbataia acanthodela Thimotheo, Benine, Oliveira & Silva, 2020 | Genus Species | 123477 |
| Retroculus acherontos Landim, Moreira & Figueiredo, 2015 | Genus Species | |
| Dysomma achiropteryx Prokofiev, 2019 | Genus Species | |
| Coregonus acrinasus Selz, Dönz, Vonlanthen & Seehausen, 2020 | Genus Species | |
| Poptella actenolepis Garcia-Ayala & Benine, 2019 | Genus Species | |
| Cyprinus acutidorsalis Chen & Huang, 1977 | Genus Species | 123477 |
| Parotocinclus adamanteus Pereira, A. Santos, de Pinna & Reis, 2019 | Genus Species | |
| Profundulus adani Dominguez-Cisneros, Velázquez-Velázquez, McMahan & Matamoros, 2021 | Genus Species | 123477 |
| Trichomycterus adautoleitei Costa, Azevedo-Santos & Katz 2023 | Genus Species | 123477 |
| Epactionotus advenus Delapieve, Carvalho & Reis, 2020 | Genus Species | |
| Salarias aequipinnis Günther, 1861 | Genus Species | |
| Pseudogobio agathonectris Tominaga & Kawase, 2019 | Genus Species | |
| Hemigrammus aguaruna Lima, Correa & Ota, 2016 | Genus Species | |
| Devario ahlanderi Kullander & Norén 2022 | Genus Species | 123477 |
| Seminemacheilus ahmeti Sungur, Jalili, Eagderi & Çiçek, 2018 | Genus Species | |
| Paracanthopoma ahriman de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Poecilia akroa Figueiredo & Moreira, 2018 | Genus Species | |
| Menziesichthys alaid Prokofiev & Iftime, 2020 | Genus Species | |
| Ostichthys alamai Matsunuma, Fukui & Motomura, 2018 | Genus Species | |
| Ponticola alasanicus Epitashvili, Japoshvili & Mumladze 2023 | Genus Species | 123477 |
| Apteronotus albertoi Peixoto, Dutra, Datovo, Menezes & de Santana, 2021 | Genus Species | 123477 |
| Bleekeria albicauda Psomadakis, Yoshinaga, Wah & Ida, 2021 | Genus Species | 123477 |
| Trimma albicaudatum Wada, Takase & Senou 2022 | Genus Species | 123477 |
| Laiphognathus albifrons Allen & Erdmann 2024 | Genus Species | 123477 |
| Ariosoma albimaculatum Kodeeswaran, Dash, Kumar & Lal 2022 | Genus Species | 123477 |
| Callogobius albipunctatus Akihito & Ikeda, 2021 | Genus Species | 123477 |
| Cyphocharax albiventris Netto-Ferreira, Nogueira, Melo & Dutra 2024 | Genus Species | 123477 |
| Schistura alboguttata Cao & Zhang, 2018 | Genus Species | |
| Mephisto albomaculosus Matsuura, Psomadakis & Tun, 2018 | Genus Species | |
| Aspidoras aldebaran Tencatt, Britto, Isbrücker & Pavanelli 2022 | Genus Species | 123477 |
| Moenkhausia alesis Petrolli & Benine, 2015 | Genus Species | |
| Centrogenys algrahami Matsunuma & Johnson 2023 | Genus Species | 123477 |
| Parapercis algrahami Johnson & Worthington Wilmer, 2018 | Genus Species | |
| Uranoscopus alius Prokofiev, 2021 | Genus Species | 123477 |
| Bryconops allisoni Silva-Oliveira, Canto & Ribeiro, 2019 | Genus Species | |
| Sinogobius allornatus Endruweit 2024 | Genus Species | 123477 |
| Cobitis almadae Doadrio, Sousa-Santos & Robalo 2023 | Genus Species | 123477 |
| Pseudohemiodon almendarizi Provenzano, Argüello & Barriga Salazar 2022 | Genus Species | 123477 |
| Cambeva alphabelardense Costa, Feltrin & Katz 2022 | Genus Species | 123477 |
| Sciadonus alphacrucis Melo, Gomes, Møller & Nielsen 2021 | Genus Species | 123477 |
| Garra alticauda Cao, Nyingi, Bart & Zhang 2023 | Genus Species | 123477 |
| Trichomycterus altipombensis Costa, Katz, Vilardo & Mattos 2022 | Genus Species | 123477 |
| Schistura altuscauda Chen, Myint, Chu & Chen, 2020 | Genus Species | 123477 |
| Crenicichla ama Říčan, Piálek, Almirón & Casciotta 2023 | Genus Species | 123477 |
| Hemigrammus amacayacu Albornoz‐Garzón, Méndez‐López, DoNascimiento & Lima, 2019 | Genus Species | |
| Misgurnus amamianus Nakajima & Hashiguchi 2022 | Genus Species | 123477 |
| Paracheilinus amanda Tea & Walsh 2023 | Genus Species | 123477 |
| Oxynoemacheilus amanos Kaya, Yoğurtçuoğlu & Freyhof, 2021 | Genus Species | 123477 |
| Melanosternarchus amaru Bernt, Crampton, Orfinger & Albert, 2018 | Genus Species | |
| Microdous ampliseriatus Endruweit 2024 | Genus Species | 123477 |
| Trichomycterus anaisae Katz & Costa, 2021 | Genus Species | 123477 |
| Barbus anatolicus Turan, Kaya, Geiger & Freyhof, 2018 | Genus Species | |
| Creagrutus andaki Albornoz-Garzón, Acosta-Santos, Bogotá-Gregory & Agudelo-Córdoba, 2020 | Genus Species | |
| Bembras andamanensis Imamura, Psomadakis & Thein, 2018 | Genus Species | |
| Gymnothorax andamanensis Mohapatra, Kiruba-Sankar, Praveenraj & Mohanty, 2019 | Genus Species | |
| Hoplolatilus andamanensis Allen & Erdmann, 2019 | Genus Species | |
| Pomacentrus andamanensis Allen, Erdmann & Ningsih, 2020 | Genus Species | 123477 |
| Ctenogobius andhraensis Herre, 1944 | Genus Species | |
| Oreonectes andongensis Luo, Yang, Du & Luo 2024 | Genus Species | 123477 |
| Betta andrei Tan 2023 | Genus Species | 123477 |
| Oryzias andrewi Roberts, Chakraborty, Yardi & Mukherjee, 2021 | Genus Species | 123477 |
| Pachycara angeloi Thiel, Knebelsberger, Kihara & Gerdes, 2021 | Genus Species | 123477 |
| Merophorus angustifrons Garman, 1899 | Genus Species | |
| Knodus angustus Menezes, Ferreira & Netto-Ferreira, 2020 | Genus Species | |
| Platycephalus angustus Steindachner, 1866 | Genus Species | |
| Salvelinus angustus Stauffer, 2020 | Genus Species | |
| Myloplus animacula Soares, Andrade & Lucinda 2023 | Genus Species | 123477 |
| Laimosemion anitae Nielsen, Hoetmer & Vandenkerkhove 2023 | Genus Species | 123477 |
| Xyrias anjaalai Augustina, Sreeram, Sukumaran, Jose & Sreekumar, 2020 | Genus Species | |
| Poropuntius anlaoensis Hoàng, Phạm & Trần 2024 | Genus Species | 123477 |
| Balitora anlongensis Luo, Chen, Zhao, Yu, Lan & Zhou 2023 | Genus Species | 123477 |
| Triplophysa anlongensis Lan, Song, Luo, Zhao, Xiao & Zhou 2023 | Genus Species | 123477 |
| Parapercis annamalai Yosuva, Ho, Jeyapragash & Saravanakuamr, 2020 | Genus Species | |
| Turcinoemacheilus ansari Jouladeh-Roudbar, Vatandoust, Doadrio & Ghanavi 2023 | Genus Species | 123477 |
| Triplophysa anshuiensis Wu, Wei, Lan & Du, 2018 | Genus Species | |
| Eustomias antea Villarins, Fischer, Prokofiev & Mincarone 2023 | Genus Species | 123477 |
| Rhinogobius aonumai Suzuki, Oseko, Yamasaki, Kimura & Shibukawa 2022 | Genus Species | 123477 |
| Bagrus aorides Jerdon, 1849 | Genus Species | |
| Astyanax apiaka Ferreira, Lima, Ribeiro, Flausino Junior, Machado & Mirande 2023 | Genus Species | 123477 |
| Eurycheilichthys apocremnus Reis, 2017 | Genus Species | |
| Ctenogobius apogonus Pezold 2022 | Genus Species | 123477 |
| Callionymus apricus McCulloch, 1926 | Genus Species | |
| Dawkinsia apsara Katwate, Marcus Knight, Anoop, Raghavan & Dahanukar, 2020 | Genus Species | |
| Cirrhilabrus aquamarinus Tea, Allen & Dailami, 2021 | Genus Species | 123477 |
| Prodontocharax aquilaepinnae Bertaco, Chuctaya, Jerep & Malabarba 2023 | Genus Species | 123477 |
| Gymnotus arapiuns Kim, Crampton & Albert, 2020 | Genus Species | |
| Crenicichla aravera Říčan, Piálek, Almirón & Casciotta 2023 | Genus Species | 123477 |
| Trichomycterus araxa Costa, Mattos, Sampaio, Giongo, Almeida & Katz 2022 | Genus Species | 123477 |
| Salmo araxensis Turan, Kottelat & Kaya 2022 | Genus Species | 123477 |
| Pareuchiloglanis arcuatum Dao, Li, Yang & Zhou, 2020 | Genus Species | |
| Salmo ardahanensis Turan, Kottelat & Kaya 2022 | Genus Species | 123477 |
| Creagrutus ardilai Ardila Rodríguez, 2021 | Genus Species | 123477 |
| Trichomycterus ardilai Ardila Rodríguez 2023 | Genus Species | 123477 |
| Hoplias argentinensis Rosso, González-Castro, Bogan, Cardoso, Mabragaña, Delpiani et al., 2018 | Genus Species | |
| Creagrutus argos Ardila Rodríguez, 2020 | Genus Species | |
| Mugilogobius arguellesi Roxas & Ablan, 1940 | Genus Species | |
| Tamanka arguellesi Roxas & Ablan, 1940 | Genus Species | |
| Nemacheilus argyrogaster Kottelat, 2021 | Genus Species | 123477 |
| Heteroclinus argyrospilos Hoese & Pogonoski 2021 | Genus Species | 123477 |
| Gymnotus aripuana Kim, Crampton & Albert, 2020 | Genus Species | |
| Diplomystes arratiae Muñoz-Ramírez, Colin, Canales-Aguirre, Manosalva, López-Rodríguez et al. 2023 | Genus Species | 123477 |
| Acyrtus arturo Tavera, Rojas-Vélez & Londoño-Cruz, 2021 | Genus Species | 123477 |
| Trichomycterus astromycterus Reis, de Pinna & Pessali, 2019 | Genus Species | |
| Rasbora ataenia Plamoottil, 2016 | Genus Species | |
| Nasutoryzias ataranensis Roberts, 2021 | Genus Species | 123477 |
| Schistura ataranensis Dvořák, Bohlen, Kottelat & Šlechtová 2023 | Genus Species | 123477 |
| Eviota atauroensis Greenfield, Erdmann & Tornabene 2023 | Genus Species | 123477 |
| Hyphessobrycon atencioi Ardila Rodríguez 2022 | Genus Species | 123477 |
| Cobitis atlantica Doadrio, Sousa-Santos, Robalo & Perea 2023 | Genus Species | 123477 |
| Bathylagus atlanticus Günther, 1878 | Genus Species | |
| Hapalogenys atlanticus Reichenow, 1877 | Genus Species | |
| Microichthys atlanticus Fricke, Ordines & Williston, 2020 | Genus Species | |
| Pikea atlanticus Schultz, 1958 | Genus Species | |
| Pseudopimelodus atricaudus Restrepo-Gómez, Rangel-Medrano, Márquez & Ortega-Lara, 2020 | Genus Species | |
| Gobius atriclypeus Garman, 1903 | Genus Species | |
| Seminemacheilus attalicus Yoğurtçuoğlu, Kaya, Geiger & Freyhof, 2020 | Genus Species | |
| Butis audebertae Keith & Mennesson 2023 | Genus Species | 123477 |
| Hoplias auri Guimarães, Rosso, González-Castro, Souza, Díaz de Astarloa & Rodrigues 2021 | Genus Species | 123477 |
| Gymnothorax aurocephalus Nashad, Mohapatra, Varghese, Ramalingam, Bineesh & Mohanty, 2020 | Genus Species | |
| Channa auroflammea Adamson, Britz & Lieng, 2019 | Genus Species | |
| Lobocheilos aurolineatus Ciccotto & Tan, 2018 | Genus Species | |
| Scleronema auromaculatum Costa, Sampaio, Giongo, Almeida, Azevedo-Santos & Katz 2022 | Genus Species | 123477 |
| Moenkhausia aurora Reia, Silva, Oliveira & Benine 2024 | Genus Species | 123477 |
| Lampris australensis Underkoffler, Luers, Hyde & Craig, 2018 | Genus Species | |
| Neopomacentrus australicus Allen & Erdmann 2024 | Genus Species | 123477 |
| Pseudogilbia australis Bauer, Schwarzhans, Moura, Nunes & Mincarone, 2021 | Genus Species | 123477 |
| Scomberomorus avirostrus Abdussamad & Toji 2023 | Genus Species | 123477 |
| Aspidoras azaghal Tencatt, Muriel-Cunha, Zuanon, Ferreira & Britto, 2020 | Genus Species | |
| Farlowella azpelicuetae Terán, Ballen, Alonso, Aguilera & Mirande, 2019 | Genus Species | |
| Thymallus baicalolenensis Matveev, Samusenok, Pronin & Tel'pukhovsky, 2005 | Genus Species | |
| Cobitis baishagensis Chen, Sui, Liang & Chen, 2016 | Genus Species | |
| Cyprinus bajiangensis Li, 2019 | Genus Species | |
| Aborichthys bajpaii Singh & Kosygin 2022 | Genus Species | 123477 |
| Rita bakalu Lal, Dwivedi & Singh, 2017 | Genus Species | |
| Gobio baliki Turan, Kaya, Bayçelebi, Aksu & Bektaş, 2017 | Genus Species | |
| Salmo baliki Turan, Aksu, Oral, Kaya & Bayçelebi, 2021 | Genus Species | 123477 |
| Petrocephalus balteatus Rochebrune, 1885 | Genus Species | |
| Schizopygopsis bangongensis Wu & Zhu, 1979 | Genus Species | |
| Sinocyclocheilus bannaensis Li, Li & Chen, 2019 | Genus Species | |
| Nandus banshlaii Kapuri, Sinha, De, Roy & Bhakat 2021 | Genus Species | 123477 |
| Garroides banthangensis Nguyen & Vu, 2014 | Genus Species | |
| Triplophysa baotianensis Li, Li, Liu & Li, 2018 | Genus Species | |
| Parosphromenus barbarae Tan & Grinang, 2020 | Genus Species | |
| Nemacheilus barbatulus hispanica Lelek, 1987 | Genus Species | 123477 |
| Cambeva barbosae Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Characidium barbosai Flausino Junior, Lima, Machado & Melo, 2020 | Genus Species | |
| Hyphessobrycon barranquilla Ardila Rodríguez 2022 | Genus Species | 123477 |
| Trichomycterus barrocus Reis & de Pinna 2022 | Genus Species | 123477 |
| Hypselobarbus basavarajai Arunachalam, Chinnaraja & Mayden, 2016 | Genus Species | |
| Chlorophthalmus basiniger Prokofiev, 2020 | Genus Species | |
| Uranoscopus batrachops Prokofiev, 2021 | Genus Species | 123477 |
| Hyphessobrycon bayleyi Lima, Bastos, Rapp Py-Daniel & Ota 2022 | Genus Species | 123477 |
| Trichogenes beagle de Pinna, Reis & Britski, 2020 | Genus Species | |
| Ctenogobius bedfordi Regan, 1908 | Genus Species | |
| Eleotris belizianus Sauvage, 1880 | Genus Species | |
| Moenkhausia bellasomniosa Soares, Lima, Bastos & Rapp Py-Daniel, 2019 | Genus Species | |
| Nemachilus bellibarus Tchang, Yueh & Hwang, 1963 | Genus Species | |
| Spectrolebias bellidoi Nielsen & Pillet, 2015 | Genus Species | |
| Moema beltramonorum Valdesalici 2023 | Genus Species | 123477 |
| Microcambeva bendego Medeiros, Moreira, de Pinna & Lima, 2020 | Genus Species | 123477 |
| Ariosoma bengalense Ray, Acharya, Khatua, Roy, Mohapatra & Mishra 2022 | Genus Species | 123477 |
| Esomus bengalensis Bhakat & Sinha, 2020 | Genus Species | |
| Moenkhausia beninei Lima & Soares, 2018 | Genus Species | |
| Rhyacoglanis beninei Crispim-Rodrigues, Silva, Shibatta, Kuranaka & Oliveira 2023 | Genus Species | 123477 |
| Parachiloglanis benjii Thoni & Gurung, 2018 | Genus Species | |
| Tosanoides bennetti Allen & Walsh, 2019 | Genus Species | |
| Nemacheilus bergi Gratzianov, 1907 | Genus Species | |
| Eustomias bertrandi Villarins, Fischer, Prokofiev & Mincarone 2023 | Genus Species | 123477 |
| Cambeva betabelardense Costa, Feltrin & Katz 2022 | Genus Species | 123477 |
| Corydoras bethanae Bentley, Grant & Tencatt, 2021 | Genus Species | 123477 |
| Grammatonotus bianchi Lisher, Thein & Psomadakis, 2021 | Genus Species | 123477 |
| Psilorhynchus bichomensis Shangningam, Kosygin & Gopi, 2019 | Genus Species | |
| Quintabarbates bicolor Roberts, 2020 | Genus Species | |
| Branchiostegus biendong Hiramatsu, Vinh & Endo, 2019 | Genus Species | |
| Hemiodus bimaculatus Nogueira, Langeani & Netto‐Ferreira, 2019 | Genus Species | |
| Equula bindoides Bleeker, 1851 | Genus Species | |
| Garroides binhluensis Nguyen & Vu, 2014 | Genus Species | |
| Mastacembelus binhluensis Vu, Nguyen & Nguyen, 2019 | Genus Species | |
| Glossogobius biorbitalis Endruweit 2024 | Genus Species | 123477 |
| Cambeva biseriata Costa, Feltrin, Mattos, Dalcin, Abilhoa & Katz 2023 | Genus Species | 123477 |
| Epigonus bispinosus Okamoto & Gon, 2018 | Genus Species | |
| Lestidium blanci Kartha, 1971 | Genus Species | |
| Microcharacidium bombioides Vieira & Netto-Ferreira, 2021 | Genus Species | 123477 |
| Hypsolebias bonita Abrantes, Ramos, Bento & Lima 2023 | Genus Species | 123477 |
| Knodus borari Silva-Oliveira, Canto & Ribeiro 2023 | Genus Species | 123477 |
| Cypselurus bosha Shakhovskoy & Parin, 2019 | Genus Species | |
| Ituglanis boticario Rizzato & Bichuette, 2015 | Genus Species | |
| Cambeva botuvera Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Gobiobotia bouommatos Man, Chen & Zhang 2024 | Genus Species | 123477 |
| Etelis boweni Andrews, Fernandez-Silva, Randall & Ho, 2021 | Genus Species | 123477 |
| Melamphaes brachysomus Kimura, Kawai & Aungtonya, 2019 | Genus Species | |
| Lacustricola bragancai Huber, 2020 | Genus Species | |
| Channa brahmacharyi Chakraborty, Yardi & Mukherjee, 2020 | Genus Species | |
| Trigla brandesii Bleeker, 1850 | Genus Species | |
| Eleotris brasiliensis Sauvage 1880 | Genus Species | 123477 |
| Pseudophallus brasiliensis Dawson, 1974 | Genus Species | |
| Hongshuia brevibarba Zeng, Shao, Jin & Zhang 2022 | Genus Species | 123477 |
| Onychostoma brevibarba Song, Cao & Zhang, 2018 | Genus Species | |
| Aphyocharax brevicaudatus Brito, Guimarães, Carvalho-Costa & Ottoni, 2019 | Genus Species | |
| Paracaesio brevidentata White & Last, 2012 | Genus Species | |
| Gobius brevirostris Günther, 1861 | Genus Species | |
| Lioscorpius brevirostris Wada & Motomura 2022 | Genus Species | 123477 |
| Stolephorus brevis Hata & Motomura 2024 | Genus Species | 123477 |
| Liobagrus brevispina Xie, Cao & Zhang 2022 | Genus Species | 123477 |
| Coregonus brienzii Selz, Dönz, Vonlanthen & Seehausen, 2020 | Genus Species | |
| Trichomycterus brigadeirensis Costa, Katz & Vilardo 2023 | Genus Species | 123477 |
| Melanorivulus britzkei Nielsen, 2017 | Genus Species | |
| Careproctus bromius Gardner, Orr & Tornabene 2023 | Genus Species | 123477 |
| Trichomycterus brucutu Reis & de Pinna 2022 | Genus Species | 123477 |
| Acantopsis bruinen Boyd, Nam, Phanara & Page, 2018 | Genus Species | |
| Scorpaena bucephalus Alcock, 1896 | Genus Species | |
| Aliteranodon bucinus Meinema & Huber 2023 | Genus Species | 123477 |
| Rhinogobius bufonius Endruweit 2024 | Genus Species | 123477 |
| Eigenmannia bumba Dutra, Ramos & Menezes 2022 | Genus Species | 123477 |
| Creteuchiloglanis bumdelingensis Thoni & Gurung, 2018 | Genus Species | |
| Salariopsis burcuae Yoğurtçuoğlu, Kaya, Atalay, Ekmekçi & Freyhof 2023 | Genus Species | 123477 |
| Dysomma bussarawiti Prokofiev, 2019 | Genus Species | |
| Hyphessobrycon bussingi Ota, Carvalho & Pavanelli, 2020 | Genus Species | |
| Parotocinclus cabessadecuia Ramos, Lima & Ramos, 2017 | Genus Species | |
| Phenacorhamdia cabocla Rocha, Ramos & Ramos, 2018 | Genus Species | |
| Cyphocharax caboclo Melo, Tencatt & Oliveira 2022 | Genus Species | 123477 |
| Characidium cacah Zanata, Ribeiro, Araújo-Porto, Pessali & Oliveira-Silva, 2020 | Genus Species | |
| Nemacheilus cacao Bohlen, Kottelat & Šlechtová 2022 | Genus Species | 123477 |
| Rineloricaria cachivera Urbano-Bonilla, Londoño-Burbano & Carvalho 2023 | Genus Species | 123477 |
| Creagrutus cacique Flausino Junior & Lima, 2019 | Genus Species | |
| Eigenmannia cacuria Dutra, Ramos & Menezes 2022 | Genus Species | 123477 |
| Mendosoma caerulescens Guichenot, 1848 | Genus Species | |
| Hypostomus cafuringa Soares, Aquino, Bagley, Langeani & Colli, 2021 | Genus Species | 123477 |
| Trichomycterus calai Ardila Rodríguez, 2019 | Genus Species | |
| Chrysobrycon calamar Vanegas-Ríos, Urbano-Bonilla & Sánchez-Garcés 2024 | Genus Species | 123477 |
| Poecilocharax callipterus Ohara, Pastana & Camelier 2022 | Genus Species | 123477 |
| Moenkhausia cambacica Marinho, Ohara & Dagosta, 2021 | Genus Species | 123477 |
| Eigenmannia camposi Herrera-Collazos, Galindo-Cuervo, Maldonado-Ocampo & Rincón-Sandoval, 2020 | Genus Species | |
| Harttia canastra Caldas, Cherobim & Langeani 2022 | Genus Species | 123477 |
| Neoplecostomus canastra Roxo, Silva, Zawadzki & Oliveira, 2017 | Genus Species | |
| Stromateus candidus Cuvier, 1829 | Genus Species | |
| Melanorivulus canesi Nielsen, 2017 | Genus Species | |
| Paracanthopoma cangussu Henschel, Katz & Costa, 2021 | Genus Species | 123477 |
| Troglonectes canlinensis Li, Ge, Bao, Du, Luo & Zou 2023 | Genus Species | 123477 |
| Gymnotocinclus canoeiro Roxo, Silva, Ochoa & Zawadzki, 2017 | Genus Species | |
| Hyphessobrycon cantoi Faria, Guimarães, Rodrigues, Oliveira & Lima, 2021 | Genus Species | 123477 |
| Careproctus canusocius Orr, 2020 | Genus Species | 123477 |
| Silurus caobangensis Nguyen, Vu & Nguyen, 2015 | Genus Species | |
| Trichomycterus caparaoensis Costa, Barbosa & Katz 2023 | Genus Species | 123477 |
| Paracanthopoma capeta de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Pyrrhulina capim Vieira & Netto-Ferreira, 2019 | Genus Species | |
| Plectrogenium capricornis Matsunuma, Uesaka, Yamakawa & Endo 2021 | Genus Species | 123477 |
| Corydoras caramater Tencatt, Couto, Santos & Sousa 2024 | Genus Species | 123477 |
| Trichomycterus caratinguensis Costa, Katz & Vilardo 2023 | Genus Species | 123477 |
| Sturisoma careirensia Londoño-Burbano & Britto 2023 | Genus Species | 123477 |
| Scleronema carijo Bockmann, Ferrer, Rizzato, Esguícero, Duboc & Ingenito 2023 | Genus Species | 123477 |
| Astyanax caroni Ruiz-C, Román-Valencia & Taphorn 2023 | Genus Species | 123477 |
| Toxotes carpentariensis Castelnau 1878 | Genus Species | 123477 |
| Paracanthopoma carrapata de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Hyphessobrycon caru Guimarães, Brito, Feitosa, Carvalho-Costa & Ottoni, 2019 | Genus Species | |
| Trichomycterus casitaensis Ardila Rodríguez, 2017 | Genus Species | |
| Rhodeus caspius Esmaeili, Sayyadzadeh, Japoshvili, Eagderi, Abbasi & Mousavi-Sabet, 2020 | Genus Species | |
| Batrochoglanis castaneus Shibatta, 2019 | Genus Species | |
| Eurycheilichthys castaneus Reis, 2017 | Genus Species | |
| Trichomycterus castelensis Costa, Katz & Vilardo 2023 | Genus Species | 123477 |
| Pethia castor Conway, Pinion & Kottelat, 2021 | Genus Species | 123477 |
| Cichla cataractae Sabaj Pérez, López-Fernández, Willis, Hemraj, Taphorn & Winemiller, 2020 | Genus Species | |
| Eigenmannia catira Cardoso & Dutra 2023 | Genus Species | 123477 |
| Tatia caudosignata DoNascimiento, Albornoz-Garzón & García-Melo, 2019 | Genus Species | |
| Cambeva cauim Reis, Ferrer & Graça 2021 | Genus Species | 123477 |
| Giuris caussei Keith & Mennesson, 2020 | Genus Species | 123477 |
| Triplophysa cehengensis Luo, Mao, Zhao, Xiao & Zhou 2023 | Genus Species | 123477 |
| Mustura celata Kottelat, 2018 | Genus Species | |
| Mystus celator Ng & Kottelat 2023 | Genus Species | 123477 |
| Hypophthalmus celiae Littman, Lundberg & Rocha, 2021 | Genus Species | 123477 |
| Pseudogramma cernunnos Prokofiev, 2019 | Genus Species | |
| Trichomycterus cerritoensis Ardila Rodríguez, 2018 | Genus Species | |
| Pachypops cevegei Cervigón, 1982 | Genus Species | |
| Oxynoemacheilus chaboras Kaya, Kurtul, Aksu, Oral & Freyhof 2024 | Genus Species | 123477 |
| Pethia chakpiensis Shangningam & Kosygin 2023 | Genus Species | 123477 |
| Cirrhilabrus chaliasi Tea, Allen & Dailami, 2021 | Genus Species | 123477 |
| Characidium chancoense Agudelo-Zamora, Ortega-Lara & Taphorn, 2020 | Genus Species | |
| Trichomycterus chapadensis Katz & Costa, 2021 | Genus Species | 123477 |
| Hemibrycon chaparensis Ruiz-C, Román-Valencia, Bastidas & Taphorn 2023 | Genus Species | 123477 |
| Giuris charpini Keith & Mennesson, 2020 | Genus Species | 123477 |
| Glyptothorax chavomensis Arunkumar & Moyon, 2017 | Genus Species | |
| Liobagrus chengduensis Chen, Guo, Wu & Wen 2022 | Genus Species | 123477 |
| Liobagrus chenhaojuni Chen, Guo & Wu 2024 | Genus Species | 123477 |
| Gobius cheni Nichols, 1931 | Genus Species | |
| Sebastes cheni Barsukov, 1988 | Genus Species | |
| Ophichthus chennaiensis Das, Mohapatra, Rajendar & Bhaskar, 2020 | Genus Species | 123477 |
| Bryconops chernoffi Silva-Oliveira, Lima & Bogotá-Gregory, 2018 | Genus Species | |
| Physoschistura chhimtuipuiensis Lalramliana, Lalhlimpuia, Solo & Vanramliana, 2016 | Genus Species | |
| Characidium chicoi da Graça, Ota & Domingues, 2019 | Genus Species | |
| Tridens chicomendesi Henschel & Costa 2023 | Genus Species | 123477 |
| Lethrinops chilingali Turner, Crampton & Genner 2023 | Genus Species | 123477 |
| Dussumieria chimaera Hata 2023 | Genus Species | 123477 |
| Profundulus chimalapensis Del Moral-Flores, López-Segovia & Hernández-Arellano, 2020 | Genus Species | |
| Chaetostoma chimu Urbano-Bonilla & Ballen, 2021 | Genus Species | 123477 |
| Misgurnus chipisaniensis Shedko & Vasil'eva 2022 | Genus Species | 123477 |
| Hyphessobrycon chiribiquete García-Alzate, Lima, Taphorn, Mojica, Urbano-Bonilla & Teixeira, 2020 | Genus Species | |
| Aulopus chirichignoae Béarez, Zavalaga & Miranda 2024 | Genus Species | 123477 |
| Schizothorax chivae Arunkumar & Moyon, 2016 | Genus Species | |
| Turcinoemacheilus christofferi Jouladeh-Roudbar, Vatandoust, Doadrio & Ghanavi 2023 | Genus Species | 123477 |
| Rhinotridens chromocaudatus Datovo, Ochoa, Vita, Presti, Ohara & Pinna 2023 | Genus Species | 123477 |
| Cambeva chrysornata Costa, Feltrin, Mattos, Dalcin, Abilhoa & Katz 2023 | Genus Species | 123477 |
| Yunnanilus chuanheensis Jiang, Zhao, Du & Wang, 2021 | Genus Species | 123477 |
| Pareuchiloglanis chui Li, Dao & Zhou, 2020 | Genus Species | |
| Pseudophoxinus cilicicus Saç, Özuluğ, Geiger & Freyhof, 2019 | Genus Species | |
| Creagrutus cimitarraensis Ardila Rodríguez 2023 | Genus Species | 123477 |
| Grallenia cinnamea Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Physiculus cirm Carvalho-Filho & Pires, 2019 | Genus Species | |
| Cypselurus clariangulatus Shakhovskoy & Parin 2022 | Genus Species | 123477 |
| Cetopsorhamdia clathrata Bockmann & Reis, 2021 | Genus Species | 123477 |
| Hemibrycon clausen Ardila Rodríguez, 2020 | Genus Species | |
| Coralliozetus clausus Hastings, 2021 | Genus Species | 123477 |
| Plectranthias clavatus Wada & Senou 2024 | Genus Species | 123477 |
| Characidium clistenesi Melo & Espíndola, 2016 | Genus Species | |
| Suttonia coccinea Endo & Kenmotsu, 2013 | Genus Species | |
| Rhinogobius coccinella Endruweit, 2018 | Genus Species | |
| Homatula coccinocola Endruweit, Min & Yang, 2018 | Genus Species | |
| Eremodon cochleari Huber & Meinema 2024 | Genus Species | 123477 |
| Channa cocnhayia Nguyen, Bui & Nguyen, 2015 | Genus Species | |
| Trichomycterus coelhorum Costa, Azevedo-Santos & Katz 2023 | Genus Species | 123477 |
| Urocampus coelorhynchus Günther 1873 | Genus Species | 123477 |
| Heteroclinus colemani Hoese, Hay & Dibattista 2024 | Genus Species | 123477 |
| Rivulus collieri Huber, 2021 | Genus Species | 123477 |
| Corydoras colossus Tencatt, Grant & Bentley 2023 | Genus Species | 123477 |
| Sicydium condotense Regan, 1914 | Genus Species | |
| Barbatula conilobus Prokofiev, 2016 | Genus Species | |
| Moenkhausia conspicua Soares & Bührnheim, 2016 | Genus Species | |
| Creagrutus convencionensis Ardila Rodríguez 2023 | Genus Species | 123477 |
| Hemibrycon convencionensis Ruiz-C, Román-Valencia, Bastidas & Taphorn 2023 | Genus Species | 123477 |
| Sinocyclocheilus convexiforeheadus Li, Yang & Li, 2017 | Genus Species | |
| Lepadichthys conwayi Fujiwara & Motomura, 2020 | Genus Species | 123477 |
| Hyphessobrycon corozalensis Ardila Rodríguez 2022 | Genus Species | 123477 |
| Creagrutus corredori Ardila Rodríguez 2023 | Genus Species | 123477 |
| Eigenmannia correntes Campos-da Paz & Queiroz, 2017 | Genus Species | |
| Eurycheilichthys coryphaenus Reis, 2017 | Genus Species | |
| Alburnoides coskuncelebii Turan, Kaya, Aksu, Bayçelebi & Bektaş, 2019 | Genus Species | |
| Corydoras costai Ottoni, Barbosa & Katz, 2016 | Genus Species | |
| Hemirhamphus cotnog Smith, 1902 | Genus Species | |
| Cyphocharax cramptoni Bortolo & Lima, 2020 | Genus Species | |
| Amblyceps crassioris Vijayakrishnan & Praveenraj 2024 | Genus Species | 123477 |
| Characidium cricarense Malanski, Sarmento-Soares, Silva-Malanski, Lopes, Ingenito & Buckup, 2019 | Genus Species | |
| Pristella crinogi Lima, Caires, Conde-Saldaña, Mirande & Carvalho, 2021 | Genus Species | 123477 |
| Ituglanis crispim Donin, de Pinna, Severi & Ramos 2023 | Genus Species | 123477 |
| Schistura crocotula Plongsesthee, Kottelat & Beamish, 2013 | Genus Species | |
| Odontesthes crossognathos Wingert, Ferrer, Neves, Baumgartner & Malabarba 2022 | Genus Species | 123477 |
| Hypostomus crulsi Soares, Aquino, Bagley, Langeani & Colli, 2021 | Genus Species | 123477 |
| Pimelodus crypticus Villa-Navarro & Cala, 2017 | Genus Species | |
| Microschemobrycon cryptogrammus Ohara, Jerep & Cavallaro, 2019 | Genus Species | |
| Opistognathus ctenion Fujiwara, Motomura & Shinohara 2023 | Genus Species | 123477 |
| Loricaria cuffyi Londoño-Burbano, Urbano-Bonilla & Thomas, 2020 | Genus Species | |
| Menticirrhus cuiaranensis Marceniuk, Caires, Rotundo, Cerqueira, Siccha-Ramirez, Wosiacki & Oliveira, 2020 | Genus Species | |
| Etheostoma cumberlandicum Jordan & Swain 1883 | Genus Species | 123477 |
| Knodus cupariensis de Sousa, Silva-Oliveira, Canto & Ribeiro, 2020 | Genus Species | |
| Trichomycterus curitiensis Ardila Rodríguez 2024 | Genus Species | 123477 |
| Satanoperca curupira Ota, Kullander, Deprá, da Graça & Pavanelli, 2018 | Genus Species | |
| Astyanax cuyuni Ruiz-C, Román-Valencia & Taphorn 2023 | Genus Species | 123477 |
| Barilius cyanochlorus Plamoottil & Vineeth, 2020 | Genus Species | |
| Careproctus cyanogladius Kai, Endo & Nakayama, 2021 | Genus Species | 123477 |
| Rhodeus cyanorostris Li, Liao & Arai, 2020 | Genus Species | |
| Mystus cyrusi Esmaeili, Sayyadzadeh, Zarei, Eagderi & Mousavi-Sabet 2022 | Genus Species | 123477 |
| Glyptothorax daemon Freyhof, Kaya, Abdullah & Geiger, 2021 | Genus Species | 123477 |
| Paracanthopoma daemon de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Silurus dakrongensis Nguyen, Vu & Nguyen, 2015 | Genus Species | |
| Alburnoides damghani Jouladeh-Roudbar, Eagderi, Esmaeili, Coad & Bogutskaya, 2016 | Genus Species | |
| Oreonectes damingshanensis Yu, Luo, Lan, Xiao & Zhou 2023 | Genus Species | 123477 |
| Parachiloglanis dangmechhuensis Thoni & Gurung, 2018 | Genus Species | |
| Parotocinclus dani Roxo, Silva & Oliveira, 2016 | Genus Species | |
| Atherina danius Hamilton, 1822 | Genus Species | |
| Nuria danrica malayensis Matte & Reichelt, 1908 | Genus Species | 123477 |
| Sinilabeo daos Nguyen, 2001 | Genus Species | |
| Oreonectes daqikongensis Deng, Wen, Xiao & Zhou, 2016 | Genus Species | |
| Mustura daral Rameshori, Chinglemba, Darshan & Vishwanath 2022 | Genus Species | 123477 |
| Sturisoma defranciscoi Londoño-Burbano & Britto 2023 | Genus Species | 123477 |
| Rivulus degreefi Collier, 2016 | Genus Species | |
| Hyphessobrycon delimai Teixeira, Netto-Ferreira, Birindelli & Sousa, 2016 | Genus Species | |
| Rhynchocypris deogyuensis Lee & Sim, 2017 | Genus Species | |
| Cobitis derzhavini Vasil’eva, Solovyeva, Levin & Vasil’ev, 2020 | Genus Species | |
| Corydoras desana Lima & Sazima, 2017 | Genus Species | |
| Exostoma dhritiae Singh, Kosygin, Gurumayum & Rath 2022 | Genus Species | 123477 |
| Trichomycterus diamantinensis Costa, Feltrin, Mattos & Katz 2024 | Genus Species | 123477 |
| Alburnoides diclensis Turan, Bektaş, Kaya & Bayçelebi, 2016 | Genus Species | |
| Cambeva difficilis Costa, Feltrin & Katz 2024 | Genus Species | 123477 |
| Gobiomorphus dinae Thacker, Geiger & Shelley 2023 | Genus Species | 123477 |
| Melanostomias dio Villarins, Fischer, Prokofiev & Mincarone 2023 | Genus Species | 123477 |
| Dinotopterygium diodon Frainer, Carvalho, Bertaco & Malabarba 2021 | Genus Species | 123477 |
| Eustomias diplomastiga Prokofiev, 2018 | Genus Species | |
| Astyanax dolinae da Graça, Oliveira, Lima, da Silva & Fernandes, 2017 | Genus Species | |
| Hypophthalmus donascimientoi Littman, Lundberg & Rocha, 2021 | Genus Species | 123477 |
| Oryzias dopingdopingensis Mandagi, Mokodongan, Tanaka & Yamahira, 2018 | Genus Species | |
| Cottus dorofeevi Sideleva & Shidkov 2024 | Genus Species | 123477 |
| Callogobius dorsomaculatus Akihito & Ikeda, 2021 | Genus Species | 123477 |
| Homatula dotui Nguyen, Wu, Cao & Zhang, 2021 | Genus Species | 123477 |
| Phoxinus dragarum Denys, Dettaï, Persat, Daszkiewicz, Hautecoeur & Keith, 2020 | Genus Species | |
| Halieutaea dromedaria Prokofiev, 2019 | Genus Species | |
| Parachiloglanis drukyulensis Thoni & Gurung, 2018 | Genus Species | |
| Halicmetus drypus Ho & Last, 2018 | Genus Species | |
| Barbatula dsapchynensis Prokofiev, 2016 | Genus Species | |
| Lanlabeo duanensis Yao, He & Peng, 2018 | Genus Species | |
| Monotocheirodon duda Carvalho, Thomaz, Urbano-Bonilla & Prada-Pedreros 2024 | Genus Species | 123477 |
| Salmo duhani Turan & Aksu 2023 | Genus Species | 123477 |
| Exostoma dujangensis Shangningam & Kosygin, 2020 | Genus Species | |
| Brycon dulcis Lima & Vieira, 2017 | Genus Species | |
| Characidium dule Agudelo-Zamora, Tavera, Murillo & Ortega-Lara, 2020 | Genus Species | |
| Creagrutus dulima Albornoz-Garzón, Conde-Saldaña, García-Melo, Taphorn & Villa-Navarro, 2018 | Genus Species | |
| Exostoma dulongensis Luo & Chen, 2020 | Genus Species | |
| Priolepis duostella Koeda, Koido, Matsuno & Endo, 2021 | Genus Species | 123477 |
| Characidium duplicatum Armbruster, Lujan & Bloom, 2021 | Genus Species | 123477 |
| Cambeva duplimaculata Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Mastiglanis durantoni de Pinna & Keith, 2019 | Genus Species | |
| Eigenmannia dutrai Peixoto, Pastana & Ballen, 2021 | Genus Species | 123477 |
| Astroblepus dux Posada, 1909 | Genus Species | 123477 |
| Hypseleotris ebneri Keith & Mennesson 2023 | Genus Species | 123477 |
| Paraliparis echongpachot Stein & Mundy, 2021 | Genus Species | 123477 |
| Aliteranodon effusorium Huber & Meinema 2024 | Genus Species | 123477 |
| Eleotris eigenmanni Popta, 1921 | Genus Species | |
| Seminemacheilus ekmekciae Yoğurtçuoğlu, Kaya, Geiger & Freyhof, 2020 | Genus Species | |
| Turcinoemacheilus ekmekciae Kaya, Yoğurtçuoğlu, Aksu, Bayçelebi & Turan 2023 | Genus Species | 123477 |
| Osteochilichthys elegans Plamoottil 2022 | Genus Species | 123477 |
| Tomiyamichthys elliotensis Allen, Erdmann & Dudgeon 2023 | Genus Species | 123477 |
| Sicyopterus elomionearum Lord, Keith, Causse & Amick, 2020 | Genus Species | |
| Grallenia emarginata Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Creagrutus embera Ardila Rodríguez 2023 | Genus Species | 123477 |
| Profundulus emilioi Calixto-Rojas, Lira-Noriega, Rubio-Godoy, Pérez-Ponce de León et al. 2023 | Genus Species | 123477 |
| Sinogobius epikalymma Endruweit 2024 | Genus Species | 123477 |
| Paracanthocobitis epimekes Dvořák, Bohlen, Kottelat & Šlechtová 2022 | Genus Species | 123477 |
| Obliquogobius eptactis Fujiwara, Psomadakis, Swe & Motomura 2021 | Genus Species | 123477 |
| Exostoma ericinum Ng, 2018 | Genus Species | |
| Belligobio eristigma Jordan & Hubbs 1925 | Genus Species | 123477 |
| Triplophysa erythraea Liu & Huang, 2019 | Genus Species | |
| Simpsonichthys espinhacensis Nielsen, Pessali & Dutra, 2017 | Genus Species | |
| Trichomycterus espinhacensis Costa & Katz 2023 | Genus Species | 123477 |
| Rhamdia eurycephala Angrizani & Malabarba, 2018 | Genus Species | |
| Phenacogaster eurytaenia Lucena, Antonetti & Lucena, 2018 | Genus Species | |
| Puntius euspilurus Plamoottil, 2016 | Genus Species | |
| Pseudobagarius eustictus Ng & Kottelat, 2021 | Genus Species | 123477 |
| Silurichthys exortivus Ng & Kottelat 2022 | Genus Species | 123477 |
| Copionodon exotatos de Pinna, Abrahão, Reis & Zanata, 2018 | Genus Species | |
| Gymnotus eyra Craig, Correa-Roldán, Ortega, Crampton & Albert, 2018 | Genus Species | |
| Gobio fahrettini Turan, Kaya, Bayçelebi, Aksu & Bektaş, 2018 | Genus Species | |
| Salmo fahrettini Turan, Kalayci, Bektaş, Kaya & Bayçelebi, 2020 | Genus Species | |
| Meiacanthus fakfakensis Allen, Erdmann & Hidayat 2024 | Genus Species | 123477 |
| Schistura falamensis Chen, Myint, Chu & Chen, 2020 | Genus Species | 123477 |
| Anablepsoides falconi Nielsen, Hoetmer & Vandenkerkhove 2023 | Genus Species | 123477 |
| Oxynoemacheilus fatsaensis Saygun, Ağdamar & Özuluğ, 2021 | Genus Species | 123477 |
| Etheostoma faulkneri Sterling & Warren, 2020 | Genus Species | |
| Phoxinus fayollarum Denys, Dettaï, Persat, Daszkiewicz, Hautecoeur & Keith, 2020 | Genus Species | |
| Paragunnellichthys fehlmanni Dawson, 1969 | Genus Species | |
| Cynopoecilus feltrini Costa, Amorim & Mattos, 2016 | Genus Species | |
| Triplophysa ferganaensis Sheraliev & Peng, 2021 | Genus Species | 123477 |
| Mendosoma fernandezianus Guichenot, 1848 | Genus Species | |
| Cobitis feroniae Novaga, Bellucci, Geiger & Freyhof 2024 | Genus Species | 123477 |
| Trichomycterus ferreri Ardila Rodríguez, 2018 | Genus Species | |
| Schistura ferruginea Lokeshwor & Vishwanath, 2013 | Genus Species | |
| Arius festae Boulenger, 1898 | Genus Species | |
| Microcambeva filamentosa Costa, Katz & Vilardo, 2020 | Genus Species | |
| Zenopsis filamentosa Kai & Tashiro, 2019 | Genus Species | |
| Aliteranodon filimbi Meinema & Huber 2023 | Genus Species | 123477 |
| Tryssogobius fisunovi Prokofiev, 2017 | Genus Species | |
| Synaptura fitzroiensis De Vis, 1882 | Genus Species | |
| Paraliparis flammeus Kai, Murasaki & Fukui, 2020 | Genus Species | |
| Coris flava Fricke & Durville 2021 | Genus Species | 123477 |
| Moenkhausia flava Britzke, Troy, Oliveira & Benine, 2018 | Genus Species | |
| Gymnoxenisthmus flavicinctus Gill, Bogorodsky & Mal, 2019 | Genus Species | |
| Opistognathus flavidus Smith-Vaniz 2023 | Genus Species | 123477 |
| Chelidoperca flavimacula Psomadakis, Gon & Htut, 2021 | Genus Species | 123477 |
| Drombus flavimentus Allen & Erdmann 2024 | Genus Species | 123477 |
| Pseudolaguvia flavipinna Bhakat, 2019 | Genus Species | |
| Hybognathus flavipinnis Cope, 1880 | Genus Species | |
| Melanorivulus flavipinnis Costa, 2017 | Genus Species | |
| Synchiropus flavistrigatus Fricke, Ordines & Ramírez-Amaro 2022 | Genus Species | 123477 |
| Rhodeus flaviventris Li, Arai & Liao, 2020 | Genus Species | |
| Meiacanthus flavivittatus Allen, Erdmann & Sianipar 2024 | Genus Species | 123477 |
| Cambeva flavopicta Costa, Feltrin & Katz, 2020 | Genus Species | |
| Characidium fleurdelis Zanata, Oliveira-Silva & Ohara 2023 | Genus Species | 123477 |
| Bryconops florenceae Silva-Oliveira, Ota, Sabaj & Rapp Py-Daniel 2021 | Genus Species | 123477 |
| Creagrutus florianensis Ardila Rodríguez 2023 | Genus Species | 123477 |
| Pimelodella floridablancaensis Ardila Rodríguez, 2017 | Genus Species | |
| Coregonus fluviatilis Isachenko, 1925 | Genus Species | |
| Disparichthys fluviatilis Herre, 1935 | Genus Sp | 123477 |
| Garra fluviatilis Kangrang, Thoni, Mayden & Beamish, 2016 | Genus Species | |
| Rhinogobius fluviatilis Tanaka, 1925 | Genus Species | |
| Rivulus foliiscola Vermeulen & Mejia-Vargas, 2020 | Genus Species | |
| Hypostomus formosae Cardoso, Brancolini, Paracampo, Lizzaralde, Covain & Montoya-Burgos, 2016 | Genus Species | |
| Malakichthys formosus Ng, Liu & Joung 2023 | Genus Species | 123477 |
| Osteochilichthys formosus Plamoottil & Vineeth 2022 | Genus Species | 123477 |
| Saurida fortis Furuhashi, Russell & Motomura 2022 | Genus Species | 123477 |
| Poptella fortispina Garcia-Ayala & Benine 2023 | Genus Species | 123477 |
| Redigobius fotuno Kobayashi, Sumarto, Mokodongan, Lawelle, Masengi & Yamahira 2024 | Genus Species | 123477 |
| Percina freemanorum Near & Dinkins, 2021 | Genus Species | 123477 |
| Hypostomus freirei Penido, Pessali & Zawadzki, 2021 | Genus Species | 123477 |
| Enneapterygius frickei Allen & Erdmann 2024 | Genus Species | 123477 |
| Hyphessobrycon frickei Guimarães, Brito, Bragança, Katz & Ottoni, 2020 | Genus Species | |
| Hypostomus froehlichi Zawadzki, Nardi & Tencatt, 2021 | Genus Species | 123477 |
| Careproctus fueguensis Matallanas & Piacentino, 2019 | Genus Species | |
| Corydoras fulleri Tencatt, Santos, Evers & Britto, 2021 | Genus Species | 123477 |
| Trichomycterus funebris Katz & Costa, 2021 | Genus Species | 123477 |
| Careproctus furcatus Mori, 1956 | Genus Species | |
| Acrossocheilus furongjiangensis Xiao 2024 | Genus Species | 123477 |
| Poptella fuscata Garcia-Ayala & Benine, 2021 | Genus Species | 123477 |
| Sparus fuscescens Houttuyn, 1782 | Genus Species | |
| Hypostomus fuscomaculatus Zawadzki & Pains da Silva 2022 | Genus Species | 123477 |
| Heteropneustes fuscus Plamoottil 2021 | Genus Species | 123477 |
| Rhamdia gabrielae Angrizani & Malabarba, 2018 | Genus Species | |
| Rhinichthys gabrielino Moyle, Buckmaster & Su 2023 | Genus Species | 123477 |
| Squalius gaditanus Doadrio, Sousa-Santos & Perea 2023 | Genus Species | 123477 |
| Megaleporinus gaiero Birindelli, Britski & Ramirez, 2020 | Genus Species | |
| Trichomycterus gairaensis Ardila Rodríguez, 2018 | Genus Species | |
| Pseudophallus galadrielae Dallevo-Gomes, Mattox & Toledo-Piza, 2020 | Genus Species | |
| Metriaclima gallireyae Miller, Konings & Stauffer, 2021 | Genus Species | 123477 |
| Cambeva gamabelardense Costa, Feltrin & Katz 2022 | Genus Species | 123477 |
| Trichomycterus gambitaensis Ardila Rodríguez 2023 | Genus Species | 123477 |
| Hypseleotris garawudjirri Shelley, Delaval & Le Feuvre 2023 | Genus Species | 123477 |
| Trichomycterus garbei Costa, Azevedo-Santos & Katz 2023 | Genus Species | 123477 |
| Astyanax garuttii Ruiz-C, Román-Valencia & Taphorn 2023 | Genus Species | 123477 |
| Tilurus gegenbauri Kölliker, 1853 | Genus Species | |
| Homatula geminusclathrata Li, Yang, Guo & Zhou 2022 | Genus Species | 123477 |
| Epigonus gemma Okamoto, Baldwin & Long 2024 | Genus Species | 123477 |
| Hyphessobrycon geryi Guimarães, Brito, Bragança, Katz & Ottoni, 2020 | Genus Species | |
| Liobagrus geumgangensis Kim, Yun & Park 2023 | Genus Species | 123477 |
| Diptychus gezaensis Huang & Chen, 1986 | Genus Species | |
| Silhouettea ghazalae Kovačić, Sadeghi & Esmaeili, 2020 | Genus Species | |
| Sturisoma ghazziae Londoño-Burbano & Britto 2023 | Genus Species | 123477 |
| Trichomycterus giarettai Barbosa & Katz, 2016 | Genus Species | |
| Anthias gibbosus Klunzinger, 1884 | Genus Species | |
| Ophiocara gigas Kobayashi & Sato 2023 | Genus Species | 123477 |
| Laimosemion gili Valdesalici & Nielsen, 2017 | Genus Species | |
| Cynoglossus glotta Fricke, Golani & Appelbaum-Golani 2023 | Genus Species | 123477 |
| Alburnus goekhani Özuluğ, Geiger & Freyhof, 2018 | Genus Species | |
| Hypsolebias gongobira Abrantes, Ramos, Bento & Lima 2023 | Genus Species | 123477 |
| Moenkhausia goya Deprá, Azevedo-Santos, Vitorino Júnior, Dagosta, Marinho & Benine, 2018 | Genus Species | |
| Diaphus gracilis Kulikova, 1961 | Genus Species | |
| Gadopsis gracilis McCoy, 1879 | Genus Species | |
| Priacanthus gracilis Hashimoto & Motomura 2024 | Genus Species | 123477 |
| Systomus gracilus Plamoottil & Maji, 2020 | Genus Species | |
| Microichthys grandis Fricke & Couperus 2023 | Genus Species | 123477 |
| Corydoras granti Tencatt, Lima & Britto, 2019 | Genus Species | |
| Monhoplichthys gregoryi Fowler, 1938 | Genus Species | |
| Cambeva grisea Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Hyporthodus griseofasciatus Moore, Wakefield, DiBattista & Newman 2022 | Genus Species | 123477 |
| Luciogobius griseus Koreeda, Maeda & Motomura 2023 | Genus Species | 123477 |
| Anthias grunniens Bloch & Schneider, 1801 | Genus Species | |
| Sturisomatichthys guaitipan Londoño-Burbano & Reis, 2019 | Genus Species | |
| Knodus guajajara Aguiar, Brito, Ottoni & Guimarães 2022 | Genus Species | 123477 |
| Hypostomus guajupia Penido, Pessali & Zawadzki, 2021 | Genus Species | 123477 |
| Sinocyclocheilus guanyangensis Chen, Peng & Zhang, 2016 | Genus Species | |
| Curimatopsis guaporensis Melo & Oliveira, 2017 | Genus Species | |
| Cambeva guaratuba Costa, Feltrin, Mattos, Dalcin, Abilhoa & Katz 2023 | Genus Species | 123477 |
| Cambeva guareiensis Katz & Costa, 2020 | Genus Species | |
| Moenkhausia guaruba Lima, Vita, Dutra, Ohara & Pastana 2023 | Genus Species | 123477 |
| Pimelodella guato Pierre & Slobodian 2024 | Genus Species | 123477 |
| Urocampus guentheri Duncker 1909 | Genus Species | 123477 |
| Oreonectes guilinensis Huang, Yang, Wu & Zhao, 2019 | Genus Species | |
| Tanichthys guipingensis Jin, Li & Zhao 2022 | Genus Species | 123477 |
| Sinocyclocheilus guiyang Shao, Cheng, Lu, Zhou & Zeng 2024 | Genus Species | 123477 |
| Triplophysa guizhouensis Wu, He, Yang & Du, 2018 | Genus Species | |
| Schizothorax gulinensis Ding, Dai & Huang 2022 | Genus Species | 123477 |
| Hemibrycon gutierrezi Ardila Rodríguez, 2020 | Genus Species | |
| Listrura gyrinura Costa, Feltrin & Katz 2023 | Genus Species | 123477 |
| Diplomystes habitae Muñoz-Ramírez, Colin, Canales-Aguirre, Manosalva, López-Rodríguez et al. 2023 | Genus Species | 123477 |
| Papiliolebias habluetzeli Valdesalici, Nielsen, Brousseau & Phunkner, 2016 | Genus Species | |
| Baryancistrus hadrostomus de Oliveira, Rapp Py-Daniel & Oyakawa, 2019 | Genus Species | |
| Pseudanthias hangapiko Shepherd, Pinheiro, Phelps, Pérez-Matus & Rocha, 2021 | Genus Species | 123477 |
| Acanthoplesiops hardyi Fujiwara & Shinohara 2022 | Genus Species | 123477 |
| Neomerinthe harenartis Matsumoto & Motomura 2023 | Genus Species | 123477 |
| Physoschistura harkishorei Das & Darshan, 2017 | Genus Species | |
| Schistura hartli Dvořák, Bohlen, Kottelat & Šlechtová 2023 | Genus Species | 123477 |
| Troglonectes hechiensis Zhao, Liu, Du & Luo, 2021 | Genus Species | 123477 |
| Opistognathus helvolus Smith-Vaniz 2023 | Genus Species | 123477 |
| Salmo henshawi Gill & Jordan, 1878 | Genus Species | 123477 |
| Glyptothorax heokheei Singh, Chowdhury, Gurumayum & Kosygin 2023 | Genus Species | 123477 |
| Curculionichthys hera Gamarra, Calegari & Reis, 2019 | Genus Species | |
| Mionurus heraldi Herre, 1943 | Genus Species | |
| Cobitis hereromacula Chen, Sui, Liang & Chen, 2016 | Genus Species | |
| Fundulus herminiamatildae García-Ramírez, Lozano-Vilano & De la Maza Benignos 2022 | Genus Species | 123477 |
| Bunocephalus hertzi Esguícero, Castro & Pereira, 2020 | Genus Species | |
| Parabotia heterocheila Zhu & Chen, 2006 | Genus Species | |
| Epigonus hexacanthus Okamoto, Baldwin & Long 2024 | Genus Species | 123477 |
| Garra hexagonarostris Nebeshwar, Rameshori & Prabina 2024 | Genus Species | 123477 |
| Stomias hexagonatus Garman 1899 | Genus Species | 123477 |
| Bryconops hexalepis Guedes, Oliveira & Lucinda, 2019 | Genus Species | |
| Muraenichthys hibinoi Mohapatra, Behera, Ray, Acharya, Mohanty & Mishra 2023 | Genus Species | 123477 |
| Cetopsorhamdia hidalgoi Faustino-Fuster & Souza, 2021 | Genus Species | 123477 |
| Paracanthocobitis hijumensis Rime, Tamang & Das 2022 | Genus Species | 123477 |
| Psenes hillii Ogilby, 1915 | Genus Species | |
| Schizopygopsis himalayensis Tsao, 1974 | Genus Species | |
| Waikhomia hira Katwate, Kumkar, Raghavan & Dahanukar, 2020 | Genus Species | |
| Ponticola hircaniaensis Zarei, Esmaeili, Kovačić, Schliewen & Abbasi 2022 | Genus Species | 123477 |
| Amblyceps hmolaii Singh, Lalronunga & Ramliana 2022 | Genus Species | 123477 |
| Spinibarbus hoenoti Nguyen, Do, Nguyen & Nguyen, 2015 | Genus Species | |
| Anablepsoides hoetmeri Nielsen, Baptista & van den Berg, 2016 | Genus Species | |
| Lefua hoffmanni Herre, 1932 | Genus Species | |
| Speolabeo hokhanhi Nguyen, Cao, Deng & Zhang, 2018 | Genus Species | |
| Paraliparis hokuto Murasaki, Takami & Fukui, 2019 | Genus Species | |
| Polymixia hollisterae Grande & Wilson, 2021 | Genus Species | 123477 |
| Malagodon honahona Carr, Martin & Sparks 2024 | Genus Species | 123477 |
| Cambeva horacioi Reis, Frota, Fabrin & Graça, 2019 | Genus Species | |
| Stolephorus horizon Hata & Motomura 2023 | Genus Species | 123477 |
| Rhinogobius houheensis Wanghe, Hu, Chen & Luan, 2020 | Genus Species | |
| Brycon howesi Lima, 2017 | Genus Species | |
| Oreoglanis hponkanensis Chen, Qin & Chen, 2017 | Genus Species | |
| Liobagrus huaiheensis Chen, Wu & Wen 2021 | Genus Species | 123477 |
| Triplophysa huanglongensis Gao, 1992 | Genus Species | |
| Butis huberti Keith & Mennesson 2023 | Genus Species | 123477 |
| Tanichthys huidongensis Jin, Li & Zhao 2022 | Genus Species | 123477 |
| Triplophysa huidongensis Xiong & Guo, 2021 | Genus Species | 123477 |
| Trichomycterus humboldti Costa & Katz, 2021 | Genus Species | 123477 |
| Fusigobius humerosus Kovačić, Bogorodsky & Alpermann 2023 | Genus Species | 123477 |
| Pareuchiloglanis hupingshanensis Kang, Chen & He, 2016 | Genus Species | |
| Lipogenys hyalinumvelum Gomes, Silva & Churro 2024 | Genus Species | 123477 |
| Opistognathus hyalinus Smith-Vaniz 2023 | Genus Species | 123477 |
| Corydoras hypnos Tencatt, Ohara, Sousa & Britto 2022 | Genus Species | 123477 |
| Microphilypnus hypolyrasimeion Caires & Toledo-Piza, 2018 | Genus Species | |
| Icelus hypselopterus Fukuzawa, Mori, Matsuzaki & Kai 2022 | Genus Species | 123477 |
| Sewellia hypsicrateae Endruweit & Nguyen, 2016 | Genus Species | |
| Careproctus iacchus Kai, Yohkairin, Fujiwara & Hamatsu, 2018 | Genus Species | |
| Characidium iaquira Zanata, Ohara, Oyakawa & Dagosta, 2020 | Genus Species | |
| Pangasius icaria Ayyathurai, Kodeeswaran, Mohindra, Singh, Ravi, Kumar, Valaparambil et al. 2022 | Genus Species | 123477 |
| Pseudophoxinus iconii Küçük, Gülle & Güçlü, 2016 | Genus Species | |
| Barbus ida Güçlü, Kalayci, Özuluğ, Küçük & Turan 2021 | Genus Species | 123477 |
| Epigonus idai Okamoto & Gon, 2018 | Genus Species | |
| Neomerinthe ignea Matsumoto, Muto & Motomura 2023 | Genus Species | 123477 |
| Melanorivulus ignescens Costa, 2017 | Genus Species | |
| Trichomycterus illuvies Reis & de Pinna 2022 | Genus Species | 123477 |
| Ilogton ilogton Endruweit 2024 | Genus Species | 123477 |
| Parapercis imamurai Johnson & Worthington Wilmer, 2018 | Genus Species | |
| Cambeva imaruhy Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Formosania immaculata Sun, Zhou & Yang 2023 | Genus Species | 123477 |
| Parachiloglanis immaculatus Chen & He 2024 | Genus Species | 123477 |
| Lycodapus imperatorius Prokofiev, Balanov, Emelianova, Orlov & Orlova 2022 | Genus Species | 123477 |
| Amblyceps improcerum Ng & Kottelat, 2018 | Genus Species | |
| Gobiobotia incarinatus Man, Chen & Zhang 2024 | Genus Species | 123477 |
| Lampris incognitus Underkoffler, Luers, Hyde & Craig, 2018 | Genus Species | |
| Cirrhimuraena indica Mohapatra, Mohanty, Ray, Mishra & Seth, 2021 | Genus Species | 123477 |
| Hemimyzon indicus Lalramliana, Solo, Lalronunga & Lalnuntluanga, 2018 | Genus Species | |
| Physiculus indicus Babu, Ho, Mariyambi & Sivanpillai 2022 | Genus Species | 123477 |
| Cobitis indus Eagderi, Seçer & Freyhof 2022 | Genus Species | 123477 |
| Turcinoemacheilus inexpectatus Freyhof & Jouladeh-Roudbar 2024 | Genus Species | 123477 |
| Krusensterniella infans Chernova 2022 | Genus Species | 123477 |
| Trichomycterus ingaiensis Katz & Costa, 2021 | Genus Species | 123477 |
| Silurichthys insulanus Low, Ng & Tan 2022 | Genus Species | 123477 |
| Epinephelus insularis Nakamura & Motomura, 2021 | Genus Species | 123477 |
| Praeformosania intermedia Fang, 1935 | Genus Species | |
| Harttia intermontana Oliveira & Oyakawa, 2019 | Genus Species | |
| Coregonus intermundia Selz & Seehausen 2023 | Genus Species | 123477 |
| Ituglanis inusitatus Ferrer & Donin, 2017 | Genus Species | |
| Coelorinchus inventionis Prokofiev, Iwamoto & Mishin 2022 | Genus Species | 123477 |
| Trichomycterus ipatinga Reis & de Pinna 2022 | Genus Species | 123477 |
| Porophryne iphipaniensis Kosygin, Gurumayum, Singh & Chowdhury, 2019 | Genus Species | |
| Hemibrycon iqueima García-Melo, Albornoz‐Garzón, García‐Melo, Villa‐Navarro & Maldonado-Ocampo, 2018 | Genus Species | |
| Garra irangensis Premananda & Singh 2023 | Genus Species | 123477 |
| Moenkhausia iris Marinho & Dagosta 2023 | Genus Species | 123477 |
| Paracanthopoma irritans de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Glyptothorax irroratus Ng & Kottelat 2023 | Genus Species | 123477 |
| Mystus irulu Vijayakrishnan & Praveenraj 2022 | Genus Species | 123477 |
| Moenkhausia ischyognatha Petrolli & Benine, 2015 | Genus Species | |
| Lepidoblennius ishigakiensis Aoyagi, 1954 | Genus Species | |
| Pempheris itoi Fowler, 1931 | Genus Species | |
| Doboatherina iwatsukii Sasaki, Kimura & Satapoomin, 2019 | Genus Species | |
| Cypselurus izumii Shakhovskoy & Parin 2022 | Genus Species | 123477 |
| Curimatopsis jaci Melo & Oliveira, 2017 | Genus Species | |
| Brachyalestes jackiae Stiassny & Melo 2023 | Genus Species | 123477 |
| Etrumeus jacksoniensis Macleay, 1878 | Genus Species | 127200 |
| Pyrolycus jaco Frable, Seid, Bronson & Møller 2023 | Genus Species | 123477 |
| Parotocinclus jacumirim Silva-Junior, Ramos & Zanata, 2020 | Genus Species | |
| Cyphocharax jagunco Dutra, Penido, Guimarães de Mello & Pessali, 2016 | Genus Species | |
| Melanostigma japonicum Balushkin, 2019 | Genus Species | |
| Ammodytes japonicus Duncker & Mohr, 1939 | Genus Species | |
| Neobythites japonicus Uiblein & Nielsen 2023 | Genus Species | 123477 |
| Trichomycterus jatobensis Costa, 2021 | Genus Species | 123477 |
| Spectracanthicus javae Chamon, Pereira, Mendonça & Akama, 2018 | Genus Species | |
| Triplophysa jinchuanensis Tan & Guo, 2021 | Genus Species | 123477 |
| Yunnanilus jiuchiensis Du, Hou, Chen & Yang, 2018 | Genus Species | |
| Neobythites jonathan Uiblein & Nielsen 2023 | Genus Species | 123477 |
| Creagrutus jordanensis Ardila Rodríguez, 2021 | Genus Species | 123477 |
| Microcanthus joyceae Whitley, 1931 | Genus Species | |
| Microcambeva jucuensis Costa, Katz, Mattos & Rangel-Pereira, 2019 | Genus Species | |
| Parosphromenus juelinae Shi, Guo, Haryono, Hong & Zhang, 2021 | Genus Species | 123477 |
| Phenacogaster julliae Lucena & Lucena, 2019 | Genus Species | |
| Hisonotus jumaorum Dias, Silva, Oliveira & Roxo, 2018 | Genus Species | |
| Hyphessobrycon juruna Faria, Lima & Bastos, 2018 | Genus Species | |
| Rineloricaria jurupari Londoño-Burbano & Urbano-Bonilla, 2018 | Genus Species | |
| Channa kachina Endruweit 2024 | Genus Species | 123477 |
| Paraliparis kadadakaleguak Stein & Mundy, 2021 | Genus Species | 123477 |
| Glyptothorax kailashi Kosygin, Singh & Mitra, 2020 | Genus Species | |
| Coelonotus kaipuae Haÿ, Mennesson, Keith & Lord 2022 | Genus Species | 123477 |
| Himantolophus kalami Rajeeshkumar, Pietsch & Saravanane 2022 | Genus Species | 123477 |
| Pisodonophis kalinga Mohanty, Behera, Acharya, Patnaik, Ray, Seth, Patro, Mishra & Mohapatra 2023 | Genus Species | 123477 |
| Periophthalmus kallopterus Bleeker, 1854 | Genus Species | |
| Psilorhynchus kamengensis Dey, Choudhury, Mazumder, Bharali, Thaosen & Sarma, 2020 | Genus Species | |
| Plectrogenium kamoharai Uesaka, Yamakawa, Matsunuma & Endo 2021 | Genus Species | 123477 |
| Plectrogenium kanayamai Uesaka, Yamakawa, Matsunuma & Endo 2021 | Genus Species | 123477 |
| Barbatula karabanowi Prokofiev, 2018 | Genus Species | |
| Ancistrus karajas de Oliveira, Rapp Py-Daniel, Zawadzki & Zuanon, 2016 | Genus Species | |
| Coregonus karasjovi Bogdanov 2022 | Genus Species | 123477 |
| Oxynoemacheilus karunensis Freyhof, 2016 | Genus Species | |
| Cheilopogon katherinae Shakhovskoy & Parin, 2019 | Genus Species | |
| Chromis katoi Iwatsubo & Motomura, 2018 | Genus Species | |
| Anablepsoides katukina Nielsen, Hoetmer & Vandenkerkhove 2023 | Genus Species | 123477 |
| Paraschistura kermanensis Sayyadzadeh, Teimori & Esmaeili, 2019 | Genus Species | |
| Eremodon kifuani Huber & Meinema 2024 | Genus Species | 123477 |
| Salvelinus kingi Stauffer, 2020 | Genus Species | |
| Parosphromenus kishii Shi, Guo, Haryono, Hong & Zhang, 2021 | Genus Species | 123477 |
| Astronesthes kiyofujii Nakayama, Ohashi & Tanaka, 2021 | Genus Species | 123477 |
| Careproctus klisi Gardner, Orr & Tornabene 2023 | Genus Species | 123477 |
| Plectranthias kojii Koeda, Muto & Wada, 2021 | Genus Species | 123477 |
| Triplophysa kokshaalensis Prokofiev, 2017 | Genus Species | |
| Mizogobius koladynae Geetakumari & Vishwanath, 2012 | Genus Species | |
| Garra koladynensis Nebeshwar & Vishwanath, 2017 | Genus Species | |
| Exostoma kottelati Darshan, Vishwanath, Abujam & Das, 2019 | Genus Species | |
| Oxynoemacheilus kottelati Turan, Aksu, Güçlü & Kalayci 2024 | Genus Species | 123477 |
| Schistura kottelati Ho, Hoang & Ngo, 2018 | Genus Species | |
| Characidium krenak Oliveira-Silva, Santos, Lopes & Zanata 2022 | Genus Species | 123477 |
| Ancistrus krenakarore de Oliveira, Rapp Py-Daniel, Zawadzki & Zuanon, 2016 | Genus Species | |
| Hyphessobrycon krenakore Teixeira, Netto-Ferreira, Birindelli & Sousa, 2016 | Genus Species | |
| Hypostomus krikati Oliveira, Guimarães, Brito & Ottoni 2022 | Genus Species | 123477 |
| Macrognathus kris Ng & Tan, 2020 | Genus Species | |
| Hypostomus krishnamurtii Zawadzki, Penido & Lucinda, 2020 | Genus Species | |
| Phoxinus krkae Bogutskaya, Jelić, Vucić, Jelić, Diripasko, Stefanov & Klobučar, 2019 | Genus Species | |
| Schistura kuehnei Dvořák, Bohlen, Kottelat & Šlechtová 2023 | Genus Species | 123477 |
| Eustomias kukuevi Prokofiev, 2018 | Genus Species | |
| Krusensterniella kurilensis Chernova 2022 | Genus Species | 123477 |
| Ctenogobius kurodai Tanaka, 1908 | Genus Species | |
| Hemigrammus kuroobi Reia & Benine, 2019 | Genus Species | |
| Parotocinclus kwarup Lehmann A. & Reis, 2021 | Genus Species | 123477 |
| Puntius kyphus Plamoottil, 2019 | Genus Species | |
| Batrochoglanis labrosus Shibatta 2024 | Genus Species | 123477 |
| Hypostomus labyrinthus Oliveira, Ribeiro, Canto & Zawadzki, 2020 | Genus Species | |
| Pantosteus lahontan Rutter, 1903 | Genus Species | |
| Glyptothorax lairamkhullensis Devi, Linthoingambi & Singh 2023 | Genus Species | 123477 |
| Garra laishrami Surachita, Chowdhury & Palita 2023 | Genus Species | 123477 |
| Physiculus lakshadeepa Babu, Ho, Mariyambi & Sivanpillai 2022 | Genus Species | 123477 |
| Bryconamericus lambayequensis Román-Valencia, Ruiz-C. & Taphorn 2023 | Genus Species | 123477 |
| Hypostomus lamberti Penido, Pessali & Zawadzki 2023 | Genus Species | 123477 |
| Gobiesox lanceolatus Hastings & Conway, 2017 | Genus Species | |
| Oryzias landangiensis Utama & Yamahira 2022 | Genus Species | 123477 |
| Silurus langsonensis Nguyen, Vu & Nguyen, 2015 | Genus Species | |
| Neodontobutis lani Zhou & Li 2022 | Genus Species | 123477 |
| Sinibotia lani Wu & Yang, 2019 | Genus Species | |
| Trichomycterus largoperculatus Costa & Katz 2022 | Genus Species | 123477 |
| Melanorivulus larissae Ywamoto, Nielsen & Oliveira, 2020 | Genus Species | |
| Schistura larketensis Choudhury, Mukhim, Basumatary, Warbah & Sarma, 2017 | Genus Species | |
| Rhyacoschistura larreci Kottelat, 2019 | Genus Species | |
| Exostoma laticaudata Arunkumar, 2020 | Genus Species | |
| Eleotris laticeps De Vis, 1884 | Genus Species | 123477 |
| Tachysurus latifrontalis Shao & Zhang 2022 | Genus Species | 123477 |
| Trichomycterus lauryi Donin, Ferrer & Carvalho, 2020 | Genus Species | |
| Trichomycterus lauzannii Miranda & Fernández, 2020 | Genus Species | |
| Coregonus lavaretus maraenoides Polyakov, 1874 | Genus Species | 123477 |
| Melanostigma lazarevi Orlovskaya & Balushkin, 2020 | Genus Species | |
| Parapercis lembehensis Allen, Erdmann & Peristiwady 2024 | Genus Species | 123477 |
| Thymallus lenensis Knizhin 2022 | Genus Species | 123477 |
| Microglanis leniceae Shibatta, 2016 | Genus Species | |
| Lycenchelys lenzeni Thiel, Knebelsberger & Eidus, 2018 | Genus Species | |
| Astyanax leoni Ruiz-C., Román-Valencia & Taphorn 2023 | Genus Species | 123477 |
| Barbatula leoparda Gauliard, Dettai, Persat, Keith & Denys, 2019 | Genus Species | |
| Thyrsites lepidopodea Lesson, 1831 | Genus Species | |
| Hadropogonichthys leptopus Machida, Shinohara & Ohta, 2004 | Genus Species | |
| Ptychobarbus leptosomus Zhang, Zhao & Niu, 2019 | Genus Species | |
| Imparfinis lepturus Silva, Reia, Morimoto, Benine & Oliveira 2023 | Genus Species | 123477 |
| Bembras leslieknappi Imamura, Psomadakis & Thein, 2018 | Genus Species | |
| Mastacembelus liemphuensis Vu, Nguyen & Nguyen, 2019 | Genus Species | |
| Thymallus ligericus Persat, Weiss, Froufe, Secci-Petretto & Denys, 2019 | Genus Species | |
| Pseudotropheus likomae Konings, Miller & Stauffer 2024 | Genus Species | 123477 |
| Pareiorhaphis lineata Pereira, Pessali, Andrade & Reis, 2017 | Genus Species | |
| Cryptocentrus liolepis Bleeker, 1876 | Genus Species | |
| Channa lipor Praveenraj, Uma, Moulitharan & Singh, 2019 | Genus Species | |
| Trichomycterus listruroides Costa, Katz & Azevedo-Santos 2023 | Genus Species | 123477 |
| Coregonus litoralis Selz & Seehausen 2023 | Genus Species | 123477 |
| Rhinogobius liui Chen & Wu, 2008 | Genus Species | |
| Notothenia loesha Balushkin, 1976 | Genus Species | |
| Kayahschistura lokalayensis Kottelat & Grego, 2020 | Genus Species | |
| Scorpaena longaecrista Wibowo & Motomura, 2021 | Genus Species | 123477 |
| Homatula longibarbata Li, Yang, Guo & Zhou 2022 | Genus Species | 123477 |
| Silurus longibarbatus Li, Li, Zhang & He, 2019 | Genus Species | |
| Physoschistura longibulla Lin, Liu & Chen 2024 | Genus Species | 123477 |
| Heteroclinus longicauda Hoese, Hay & Dibattista 2024 | Genus Species | 123477 |
| Microsternarchus longicaudatus Sousa, Wosiacki, Muriel-Cunha, Prudente, Sousa & Peixoto 2024 | Genus Species | 123477 |
| Ophichthus longicorpus Vo & Ho, 2021 | Genus Species | 123477 |
| Protocobitis longicostatus Zhou, Qin, Du & Wu 2024 | Genus Species | 123477 |
| Careproctus longidigitus Kai & Matsuzaki, 2019 | Genus Species | |
| Foa longimana Weber, 1909 | Genus Species | |
| Gymnocypris longimandibularis Tsao, Chen, Wu & Zhu, 1992 | Genus Species | |
| Glyptothorax longinema Li, 1984 | Genus Species | |
| Cambeva longipalata Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Acanthocobitis longipinnis Peters 1861 | Genus Species | 123477 |
| Plectrogenium longipinnis Matsunuma, Uesaka, Yamakawa & Endo 2021 | Genus Species | 123477 |
| Propherallodus longipterus Fujiwara & Motomura, 2018 | Genus Species | |
| Muraenichthys longirostris Hibino, Ho & McCosker, 2019 | Genus Species | |
| Sinocyclocheilus longshanensis Li & Wu, 2018 | Genus Species | |
| Karstsinnectes longzhouensis Ge, Du & Zhou 2024 | Genus Species | 123477 |
| Sinilabeo loos Nguyen, 2001 | Genus Species | |
| Aphyosemion lorai Valdesalici & Malumbres 2023 | Genus Species | 123477 |
| Eigenmannia loretana Waltz & Albert, 2018 | Genus Species | |
| Hemibrycon lorethae Ruiz-C, Román-Valencia, Bastidas & Taphorn 2023 | Genus Species | 123477 |
| Araichthys loro Zawadzki, Bifi & Mariotto, 2016 | Genus Species | |
| Stolephorus lotus Hata & Motomura 2022 | Genus Species | 123477 |
| Oryzias loxolepis Kobayashi, Mokodongan & Yamahira 2023 | Genus Species | 123477 |
| Kneria luansaensis Kalumba, Abwe, Schedel, Manda, Schliewen & Vreven 2023 | Genus Species | 123477 |
| Eustomias lucenae Villarins, Fischer, Prokofiev & Mincarone 2023 | Genus Species | 123477 |
| Microglanis lucenai Lehmann A., Bartzen & Malabarba 2024 | Genus Species | 123477 |
| Hyphessobrycon lucenorum Ohara & Lima, 2015 | Genus Species | |
| Trichomycterus luetkeni Katz & Costa, 2021 | Genus Species | 123477 |
| Tanichthys luheensis Jin, Li & Zhao 2022 | Genus Species | 123477 |
| Eurycheilichthys luisae Reis, 2017 | Genus Species | |
| Tatia luisae Ribeiro, Silva-Oliveira, da Silva & Canto 2022 | Genus Species | 123477 |
| Garra lungongza Ngangbam & Lithoingambi 2023 | Genus Species | 123477 |
| Ancistrus luzia Neuhaus, Britto, Birindelli & Sousa 2022 | Genus Species | 123477 |
| Labrax lyiuy Basilewsky, 1855 | Genus Species | |
| Pomacentrus maafu Allen & Drew, 2012 | Genus Species | |
| Listrura macacuensis Costa & Katz 2021 | Genus Species | 123477 |
| Listrura macaensis Costa & Katz 2021 | Genus Species | 123477 |
| Gephyrocharax machadoi Ferreira, Faria, Ribeiro, Santana, Quagio-Grassioto & Menezes, 2018 | Genus Species | |
| Corydoras maclurei Tencatt, Gomes & Evers 2023 | Genus Species | 123477 |
| Platycephalus macrocephalus Weber, 1913 | Genus Species | |
| Gobius macrophthalmus Kessler, 1877 | Genus Species | |
| Pseudophichthys macroporis Kotthaus, 1968 | Genus Species | |
| Liniparhomaloptera macrostoma Wu, Xiu & Yang, 2016 | Genus Species | |
| Ophiocara macrostoma Kobayashi & Sato 2023 | Genus Species | 123477 |
| Rhinogobius maculagenys Wu, Deng, Wang & Liu, 2018 | Genus Species | |
| Mikrogeophagus maculicauda Staeck, Ottoni & Schindler 2022 | Genus Species | 123477 |
| Curimatopsis maculosa Melo, Vari & Oliveira, 2016 | Genus Species | |
| Pterygotrigla madagascarensis Yato & Heemstra, 2019 | Genus Species | |
| Plectranthias maekawa Wada, Senou & Motomura, 2018 | Genus Species | |
| Sabanejewia maeotica Vasil'eva & Vasil'ev 2023 | Genus Species | 123477 |
| Serrasalmus magallanesi Gallo-Cardozo, Maldonado, Careaga & Carvajal-Vallejos 2024 | Genus Species | 123477 |
| Doboatherina magnidentata Sasaki, Kimura, Satapoomin & Nguyen, 2019 | Genus Species | |
| Sinobdella magnificus Endruweit 2024 | Genus Species | 123477 |
| Bembradium magnoculum Kishimoto, Kawai, Tashiro & Aungtonya, 2019 | Genus Species | |
| Pseudopimelodus magnus Restrepo-Gómez, Rangel-Medrano, Márquez & Ortega-Lara, 2020 | Genus Species | |
| Eigenmannia magoi Herrera-Collazos, Galindo-Cuervo, Maldonado-Ocampo & Rincón-Sandoval, 2020 | Genus Species | |
| Clarias magony Mason, 1850 | Genus Species | |
| Pseudacanthicus major Chamon & Costa e Silva, 2018 | Genus Species | |
| Paraschistura makranensis Eagderi, Mousavi-Sabet & Freyhof, 2019 | Genus Species | |
| Ancistrus maldonadoi Bifi & Ortega, 2020 | Genus Species | |
| Pariolius maldonadoi Faustino-Fuster, López-Castaño, Quiñones & Meza-Vargas 2024 | Genus Species | 123477 |
| Phalloceros maldonadoi Souto-Santos, Lucinda & Buckup 2023 | Genus Species | 123477 |
| Istigobius maleta Allen & Erdmann 2024 | Genus Species | 123477 |
| Paracanthopoma malevola de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Hemibrycon mamorensis Ruiz-C, Román-Valencia, Bastidas & Taphorn 2023 | Genus Species | 123477 |
| Pomacentrus mandacani Allen, Erdmann & Utama 2024 | Genus Species | 123477 |
| Enteromius mandelai Kambikambi, Kadye & Chakona, 2021 | Genus Species | 123477 |
| Exostoma mangdechhuensis Thoni & Gurung, 2018 | Genus Species | |
| Physoschistura mango Conway & Kottelat 2023 | Genus Species | 123477 |
| Schizopygopsis maphamyumensis Wu & Zhu, 1979 | Genus Species | |
| Bryconops marabaixo Silva‐Oliveira, Moreira, Lima & Rapp Py‐Daniel, 2020 | Genus Species | |
| Hypseleotris maranda Shelley, Delaval & Le Feuvre 2023 | Genus Species | 123477 |
| Lacustricola margaritatus Nagy & Watters 2022 | Genus Species | 123477 |
| Paraliparis marianae Stein & Mundy, 2021 | Genus Species | 123477 |
| Rasbora marinae Tan & Kottelat, 2020 | Genus Species | |
| Creagrutus mariposa Ardila Rodríguez, 2021 | Genus Species | 123477 |
| Cheilopogon marisrubri Shakhovskoy & Parin, 2019 | Genus Species | |
| Oxynoemacheilus marmaraensis Turan, Bayçelebi & Kalayci 2023 | Genus Species | 123477 |
| Vanmanenia marmorata Deng & Zhang, 2021 | Genus Species | 123477 |
| Clinus marmoratus Castelnau, 1861 | Genus Species | |
| Halicmetus marmoratus Weber, 1913 | Genus Species | |
| Cyprinodon martae Steindachner, 1876 | Genus Species | |
| Creagrutus martinezi Ardila Rodríguez, 2021 | Genus Species | 123477 |
| Cociella martingomoni Imamura & Aungtonya, 2020 | Genus Species | 123477 |
| Oxynoemacheilus marunensis Sayyadzadeh & Esmaeili, 2020 | Genus Species | |
| Steatocranus masalamasoso Ibala Zamba, Weiss, Mamonekene, Schliewen & Vreven 2022 | Genus Species | 123477 |
| Coelorinchus mascarenus Prokofiev & Iwamoto, 2020 | Genus Species | |
| Gobiomorphus mataraerore Thacker, Geiger & Shelley 2023 | Genus Species | 123477 |
| Garra matensis Nebeshwar & Vishwanath, 2017 | Genus Species | |
| Ariosoma maurostigma Kodeeswaran, Mohapatra, Dhinakaran, Kumar & Lal 2022 | Genus Species | 123477 |
| Eustomias mavka Prokofiev, 2018 | Genus Species | |
| Kneria maxi Kalumba, Abwe, Schedel, Manda, Schliewen & Vreven 2023 | Genus Species | 123477 |
| Rhinogobius maxillivirgatus Xia, Wu & Li, 2018 | Genus Species | |
| Australoheros mboapari Lucena, Kullander, Norén & Calegari 2023 | Genus Species | 123477 |
| Ophichthus mccoskeri Sumod, Hibino, Manjabrayakath & Sanjeevan, 2019 | Genus Species | |
| Ulocentra meadiae Jordan & Evermann, 1898 | Genus Species | |
| Glyptothorax medogensis Chen & He 2024 | Genus Species | 123477 |
| Ancistrus megacanthus Widholzer, Borsoi, Reis & Lehmann A. 2024 | Genus Species | 123477 |
| Opistognathus megalops Smith-Vaniz 2023 | Genus Species | 123477 |
| Plectrogenium megalops Matsunuma, Uesaka, Yamakawa & Endo 2021 | Genus Species | 123477 |
| Lampris megalopsis Underkoffler, Luers, Hyde & Craig, 2018 | Genus Species | |
| Hemibrycon megantoniensis Ruiz-C, Román-Valencia, Bastidas & Taphorn 2023 | Genus Species | 123477 |
| Physiculus megastomus Tang, 2021 | Genus Species | 123477 |
| Pseudolaguvia meghalayaensis Lokeshwor & Marak 2022 | Genus Species | 123477 |
| Rivulus mejiai Vermeulen, 2020 | Genus Species | |
| Toxotes mekongensis Kottelat & Tan, 2018 | Genus Species | |
| Dario melanogrammus Britz, Kullander & Rüber 2022 | Genus Species | 123477 |
| Metynnis melanogrammus Ota, Rapp Py-Daniel & Jégu, 2016 | Genus Species | |
| Rhinopetitia melanohumeralis Menezes & Netto-Ferreira, 2019 | Genus Species | |
| Helcogramma melanolancea Tashiro & Motomura, 2018 | Genus Species | |
| Cambeva melanoptera Costa, Abilhoa, Dalcin & Katz 2022 | Genus Species | 123477 |
| Conger melanopterus Kodeeswaran, Smith, Dhas, Kumar & Lal 2023 | Genus Species | 123477 |
| Trichomycterus melanopygius Reis, dos Santos, Britto, Assis Volpi & de Pinna, 2020 | Genus Species | |
| Curimatopsis melanura Dutra, Melo & Netto-Ferreira, 2018 | Genus Species | |
| Loricariichthys melanurus Reis, Vieira & Pereira, 2021 | Genus Species | 123477 |
| Oxynoemacheilus melenicus Turan, Aksu & Kalayci 2023 | Genus Species | 123477 |
| Cobitis mellaria Doadrio & Perea 2023 | Genus Species | 123477 |
| Listrura menezesi Villa-Verde, de Pinna, Reis & Oyakawa 2022 | Genus Species | 123477 |
| Acheilognathus mengyangensis Chen, Gong & Guo, 2021 | Genus Species | 123477 |
| Awaouichthys menoni Chatterjee & Mishra, 2013 | Genus Species | |
| Aspidoras mephisto Tencatt & Bichuette, 2017 | Genus Species | |
| Eleotris mertoni Weber, 1911 | Genus Species | |
| Melanostigma meteori Balushkin & Orlovskaya, 2019 | Genus Species | |
| Stolephorus meteorum Hata, Lavoué, Bogorodsky, Alpermann & Motomura 2023 | Genus Species | 123477 |
| Stolephorus miarchus Jordan & Gilbert, 1882 | Genus Species | 123477 |
| Homatula microcephala Li, Yang, Guo & Zhou 2022 | Genus Species | 123477 |
| Glossanodon microcephalus Endo & Nashida, 2012 | Genus Species | |
| Melanobranchus micronema Gilbert, 1905 | Genus Species | |
| Baryancistrus micropunctatus de Oliveira, Rapp Py-Daniel & Oyakawa, 2019 | Genus Species | |
| Opistognathus microspilus Smith-Vaniz 2023 | Genus Species | 123477 |
| Eustomias mikhailini Prokofiev, 2020 | Genus Species | |
| Moxostoma milleri Robins & Raney, 1957 | Genus Species | |
| Hoplichthys mimaseanus Nagano, Endo & Yabe, 2013 | Genus Species | |
| Acanthurus mindorensis Herre, 1927 | Genus Species | |
| Cobitis minhi Ngô, 2008 | Genus Species | |
| Garra minibarbata Cao, Nyingi, Bart & Zhang 2023 | Genus Species | 123477 |
| Meadia minor Vo & Ho, 2021 | Genus Species | 123477 |
| Hypostomus minotauros Zawadzki, Penido, Pessali & Lucinda 2024 | Genus Species | 123477 |
| Cheilonimata minuta Provenzano 2023 | Genus Species | 123477 |
| Bryconamericus misei Pedroso, Deprá & Pavanelli 2024 | Genus Species | 123477 |
| Hoplias misionera Rosso, Mabragaña, González-Castro, Delpiani, Avigliano, Schenone et al., 2016 | Genus Species | |
| Aphyosemion mitemelense Malumbres, Sonnenberg & van der Zee 2022 | Genus Species | 123477 |
| Rhinogobius mizunoi Suzuki, Shibukawa & Aizawa, 2017 | Genus Species | |
| Paralithoxus mocidade Rapp-Py-Daniel, Oliveira, Bastos, Ito, Zuanon & Briglia-Ferreira, 2019 | Genus Species | |
| Pachycara moelleri Shinohara, 2012 | Genus Species | |
| Turcinoemacheilus moghbeli Jouladeh-Roudbar, Vatandoust, Doadrio & Ghanavi 2023 | Genus Species | 123477 |
| Trichomycterus mogotensis Ardila Rodríguez, 2017 | Genus Species | |
| Spinipterus moijiri Rocha, Rossoni, Akama & Zuanon, 2019 | Genus Species | |
| Chrysobrycon mojicai Vanegas-Ríos & Urbano-Bonilla, 2017 | Genus Species | |
| Eleotris moncktoni Regan 1908 | Genus Species | 123477 |
| Leptocephalus monganius Phillipps, 1932 | Genus Species | |
| Moenkhausia monicae Marinho, Dagosta, Camelier & Lima, 2016 | Genus Species | |
| Stelgistrum mororane Jordan & Seale, 1906 | Genus Species | |
| Harpodon mortenseni Hardenberg, 1933 | Genus Species | |
| Glyptothorax motbungensis Premananda & Singh 2023 | Genus Species | 123477 |
| Awaous motla Seth, Roy, Sura, Puvala, Mishra & Mohapatra 2023 | Genus Species | 123477 |
| Garra motuoensis Gong, Freyhof, Wang, Liu, Liu, Lin, Jiang & Liu, 2018 | Genus Species | |
| Parananochromis moutingae Ibala Zamba, Liyandja, Lamboj, Snoeks & Vreven 2022 | Genus Species | 123477 |
| Microcambeva mucuriensis Costa, Katz, Mattos & Rangel-Pereira, 2019 | Genus Species | |
| Coregonus muelleri Selz & Seehausen 2023 | Genus Species | 123477 |
| Ammoglanis multidentatus Costa, Mattos & Santos, 2019 | Genus Species | |
| Salvelinus multidentatus Stauffer, 2020 | Genus Species | |
| Scopelogadus multilamellatus Kotlyar 2021 | Genus Species | 123477 |
| Gobio multipunctatus Vasil’eva, Mamilov & Sharakhmetov 2023 | Genus Species | 123477 |
| Eumicrotremus multituberculatus Voskoboinikova, 2018 | Genus Species | |
| Rakthamichthys mumba Praveenraj, Thackeray, Mohapatra & Pavan-Kumar, 2021 | Genus Species | 123477 |
| Imparfinis munduruku Castro & Wosiacki, 2019 | Genus Species | |
| Salmo munzuricus Turan, Kottelat & Kaya, 2017 | Genus Species | |
| Salmo murathani Turan, Kottelat & Kaya 2022 | Genus Species | 123477 |
| Trichomycterus mutabilicolor Costa 2022 | Genus Species | 123477 |
| Schistura myaekanbawensis Dvořák, Bohlen, Kottelat & Šlechtová 2023 | Genus Species | 123477 |
| Chelidoperca myathantuni Psomadakis, Gon & Htut, 2021 | Genus Species | 123477 |
| Trichomycterus nabusimakensis Ardila Rodríguez, 2018 | Genus Species | |
| Phenacogaster naevata Antonetti, Lucena & Lucena, 2018 | Genus Species | |
| Ophichthus naga McCosker & Psomadakis, 2018 | Genus Species | |
| Rhamphocottus nagaakii Munehara, Yamazaki & Tsuruoka 2022 | Genus Species | 123477 |
| Pseudecheneis nagalandensis Shangningam & Kosygin, 2020 | Genus Species | |
| Paramisgurnus nahangensis Nguyen & Bui, 2009 | Genus Species | |
| Psilorhynchus nahlongthai Dey, Choudhury, Mazumder, Thaosen & Sarma, 2020 | Genus Species | |
| Cobitis nalbanti Vasil'eva, Kim, Vasil'ev, Ko & Won, 2016 | Genus Species | |
| Squalius namak Khaefi, Esmaeili, Sayyadzadeh, Geiger & Freyhof, 2016 | Genus Species | |
| Characidium nambiquara Zanata & Ohara, 2020 | Genus Species | 123477 |
| Acheilognathus nanchongensis Deng, 1996 | Genus Species | |
| Parotocinclus nandae Lehmann A., Camelier & Zanata, 2020 | Genus Species | |
| Rhinogobius nanophyllum Endruweit, 2018 | Genus Species | |
| Ophichthus nansen McCosker & Psomadakis, 2018 | Genus Species | |
| Histiophryne narungga Arnold & Pietsch, 2018 | Genus Species | |
| Creagrutus narvaezi Ardila Rodríguez 2023 | Genus Species | 123477 |
| Scorpaena nasicornua Fricke & Zhukov, 2020 | Genus Species | |
| Solegnathus naso Whitley, 1941 | Genus Species | |
| Hypselobarbus nasutus Arunachalam, Chinnaraja & Mayden, 2016 | Genus Species | |
| Mugil natalensis Castelnau, 1861 | Genus Species | |
| Eustomias natalisa Prokofiev, 2020 | Genus Species | |
| Ammoglanis natgeorum Henschel, Lujan & Baskin, 2020 | Genus Species | |
| Aliteranodon ndoano Meinema & Huber 2023 | Genus Species | 123477 |
| Indoreonectes neeleshi Kumkar, Pise, Gorule, Verma & Kalous, 2021 | Genus Species | 123477 |
| Hemigrammocypris neglectus Stieler, 1907 | Genus Species | |
| Melanorivulus nelsoni Deprá, Silva & da Graça, 2017 | Genus Species | |
| Pseudolaguvia nepalensis Rayamajhi, Arunachalam & Usharamalakshmi, 2016 | Genus Species | |
| Apocryptes nexipinnis Cantor, 1849 | Genus Species | |
| Metriaclima ngarae Miller, Konings & Stauffer, 2021 | Genus Species | 123477 |
| Garra ngatangkha Arunkumar & Moyon, 2019 | Genus Species | |
| Rhinogobius ngutinhoceps Endruweit, 2018 | Genus Species | |
| Spinibarbus nguyenhuuduci Nguyen, Do, Nguyen & Nguyen, 2015 | Genus Species | |
| Ammoglanis nheengatu Canto, Hercos & Ribeiro 2022 | Genus Species | 123477 |
| Microphis nicoleae Haÿ, Mennesson, Lord & Keith 2023 | Genus Species | 123477 |
| Rhinogobius niger Huang, Chen & Shao, 2016 | Genus Species | |
| Pectenocypris nigra Wibowo, Ahnelt & Kertamihardja, 2016 | Genus Species | |
| Grallenia nigrifasciata Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Bleekeria nigrilinea Psomadakis, Yoshinaga, Wah & Ida, 2021 | Genus Species | 123477 |
| Grallenia nigrimarginata Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Robinsichthys nigrimarginatus Tornabene, Manning, Robertson, Van Tassell & Baldwin 2022 | Genus Species | 123477 |
| Dolichopteryx nigripes Prokofiev, 2020 | Genus Species | |
| Opistognathus nigripinnis Smith-Vaniz 2023 | Genus Species | 123477 |
| Spinibarbus nigripinnis Nguyen, Do, Nguyen & Nguyen, 2015 | Genus Species | |
| Spinibarbus nigriventralis Nguyen & Vu, 2012 | Genus Species | |
| Rhodeus nigrodorsalis Li, Liao & Arai, 2020 | Genus Species | |
| Rhinopetitia nigrofasciata Menezes & Netto-Ferreira, 2019 | Genus Species | |
| Hypostomus nigrolineatus Zawadzki, Carvalho, Birindelli & Azevedo, 2016 | Genus Species | |
| Rostrogobio nikolskii Dao & Mai, 1959 | Genus Species | |
| Hemiculter nikolskyi Vasil’eva, Vasil’ev & Shedko 2022 | Genus Species | 123477 |
| Thymallus nikolskyi Kaschenko, 1899 | Genus Species | |
| Loricaria nimairaco Londoño-Burbano, Urbano-Bonilla, Thomas & Britto 2023 | Genus Species | 123477 |
| Esomus nimasowi Abujam, Gogoi, Das, Das, Biswas & Bleher, 2021 | Genus Species | 123477 |
| Petroleuciscus ninae Turan, Kalayci, Kaya, Bektaş & Küçük, 2018 | Genus Species | |
| Hypselobarbus nitidus Plamoottil & Vineeth 2022 | Genus Species | 123477 |
| Cypselurus nossibe Shakhovskoy & Parin 2022 | Genus Species | 123477 |
| Cambeva notabilis Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Schistura notasileum Endruweit, Yang & Liu, 2016 | Genus Species | |
| Rineloricaria nudipectoris Mejia, Ferraro & Buckup 2023 | Genus Species | 123477 |
| Discognathus nudiventris Berg, 1905 | Genus Species | |
| Knodus nuptialis Menezes & Marinho, 2019 | Genus Species | |
| Creteuchiloglanis nuthemuensis Sarkar, Tenali, Chandran & Singh 2024 | Genus Species | 123477 |
| Elassodiscus nyctereutes Kai, Matsuzaki, Orr, Mori & Kamiunten, 2020 | Genus Species | |
| Gymnocranius obesus Chen, Miki & Borsa, 2017 | Genus Species | |
| Ammoglanis obliquus Henschel, Bragança, Rangel-Pereira & Costa, 2020 | Genus Species | |
| Coregonus obliterus Selz & Seehausen 2023 | Genus Species | 123477 |
| Knodus obolus Deprá, Ota, Vitorino Júnior & Ferreira, 2021 | Genus Species | 123477 |
| Plectrogenium occidentale Matsunuma, Uesaka, Yamakawa & Endo 2021 | Genus Species | 123477 |
| Notothenia occidentalis Balushkin, 1976 | Genus Species | |
| Sinogobius occidentalis Endruweit 2024 | Genus Species | 123477 |
| Synchiropus occidentalis Fricke, 1983 | Genus Species | |
| Puntius ocellus Plamoottil & Vineeth, 2020 | Genus Species | 123477 |
| Ambassis octava Ghazali, Lavoué, Nor, Muhammad-Rasul & Tan 2023 | Genus Species | 123477 |
| Uranoscopus oculocirrhis Prokofiev, 2021 | Genus Species | 123477 |
| Cirrhimuraena odishaensis Mohanty, Behera, Patro & Mohapatra 2023 | Genus Species | 123477 |
| Parapsilorhynchus odishaensis Baliarsingh, Kosygin & Swain, 2017 | Genus Species | |
| Gymnothorax odishi Mohapatra, Mohanty, Smith, Mishra & Roy, 2018 | Genus Species | |
| Cottus ohlone Moyle & Campbell 2022 | Genus Species | 123477 |
| Bidenichthys okamotoi Møller, Schwarzhans, Lauridsen & Nielsen 2022 | Genus Species | 123477 |
| Branchiostegus okinawaensis Hiramatsu & Yoshino, 2012 | Genus Species | |
| Hyphessobrycon olayai Ardila Rodríguez 2022 | Genus Species | 123477 |
| Melanostigma olgae Balushkin & Moganova, 2017 | Genus Species | |
| Chromis oligactis Prokofiev & Astakhov 2023 | Genus Species | 123477 |
| Gobius oligolepis Bleeker, 1854 | Genus Species | |
| Rhinopetitia oligolepis Menezes & Netto-Ferreira, 2019 | Genus Species | |
| Synaphobranchus oligolepis Ho, Hong & Chen, 2018 | Genus Species | |
| Enneapterygius olivaceus Dewa, Tashiro & Motomura 2023 | Genus Species | 123477 |
| Leporinus oliveirai Ito, Souza-Shibatta, Venturieri & Birindelli 2023 | Genus Species | 123477 |
| Cypselurus olpar Shakhovskoy & Parin, 2019 | Genus Species | |
| Oreoglanis omkoiense Suvarnaraksha, 2020 | Genus Species | |
| Eustomias ophioglossa Villarins, Fischer, Prokofiev & Mincarone 2023 | Genus Species | 123477 |
| Eigenmannia oradens Dutra, Peixoto, de Santana & Wosiacki, 2018 | Genus Species | |
| Cambeva orbitofrontalis Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Panaqolus orcesi Provenzano, Barriga-Salazar & Stewart 2024 | Genus Species | 123477 |
| Chaetostoma orientale Meza-Vargas, Calegari, Lujan, Ballen, Oyakawa, Sousa, Rapp Py-Daniel & Reis 2022 | Genus Species | 123477 |
| Anablepsoides origuelai Nielsen & Veiga, 2021 | Genus Species | 123477 |
| Micromyzon orinoco Carvalho, Lundberg, Baskin, Friel & Reis, 2016 | Genus Species | |
| Cyphocharax orion Melo & Faria 2024 | Genus Species | 123477 |
| Grallenia ornata Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Aphredoderus ornatus Muller & Simons 2024 | Genus Species | 123477 |
| Neomerinthe ornithoptera Matsumoto & Motomura 2024 | Genus Species | 123477 |
| Careproctus orri Kai & Tashiro, 2021 | Genus Species | 123477 |
| Macrognathus orthosemos Britz & Kottelat, 2020 | Genus Species | |
| Barbus oscensis Rossi & Plazzi 2023 | Genus Species | 123477 |
| Cobitis osurgeticus Kamensky 1899 | Genus Species | 123477 |
| Microphysogobio oujiangensis Sun, Huang & Zhao 2022 | Genus Species | 123477 |
| Odontostilbe pacaasnovos Chuctaya, Ohara & Malabarba, 2020 | Genus Species | |
| Myleus pachyodus Andrade, Jégu, Buckup & Netto-Ferreira, 2018 | Genus Species | |
| Asquamiceps pacificus Parr, 1954 | Genus Species | |
| Amphilius pagei Thomson & Swartz, 2018 | Genus Species | |
| Neobythites pako Uiblein & Nielsen 2023 | Genus Species | 123477 |
| Doboatherina palauensis Kimura, Takeda, Gotoh & Hanzawa, 2020 | Genus Species | |
| Glyptothorax pallens Mousavi-Sabet, Eagderi, Vatandoust & Freyhof 2021 | Genus Species | 123477 |
| Curimatopsis pallida Melo & Oliveira, 2017 | Genus Species | |
| Pogonophryne pallida Balushkin & Spodareva, 2015 | Genus Species | |
| Schistura palma Kottelat 2023 | Genus Species | 123477 |
| Physiculus palmatus Klunzinger, 1872 | Genus Species | 123477 |
| Diapoma pampeana Ito, Carvalho, Pavanelli, Vanegas-Ríos & Malabarba 2022 | Genus Species | 123477 |
| Mastacembelus pani Endruweit 2024 | Genus Species | 123477 |
| Garra panitvongi Tangjitjaroen, Randall, Tongnunui, Boyd & Page 2023 | Genus Species | 123477 |
| Cambeva panthera Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Panaqolus pantostiktos Provenzano, Barriga-Salazar & Stewart 2024 | Genus Species | 123477 |
| Triplophysa panzhouensis Yu, Luo, Lan, Xiao & Zhou 2023 | Genus Species | 123477 |
| Cynoglossus papuensis Allen & Erdmann 2024 | Genus Species | 123477 |
| Valenciennea papuensis Allen, Erdmann & Mambrasar 2024 | Genus Species | 123477 |
| Coelorinchus paraboliceps Prokofiev & Iwamoto, 2020 | Genus Species | |
| Rineloricaria paraibensis Mejia & Buckup 2024 | Genus Species | 123477 |
| Sternarchus paranaensis Schindler, 1940 | Genus Species | |
| Bryconamericus parapetiensis Román-Valencia, Ruiz-C. & Taphorn 2023 | Genus Species | 123477 |
| Sillago parasihama Gao, Xiao & Guo 2022 | Genus Species | 123477 |
| Garra paratrilobata Roni, Chinglemba, Rameshori & Vishwanath, 2019 | Genus Species | |
| Neoplecostomus paraty Cherobim, Lazzarotto & Langeani, 2017 | Genus Species | |
| Inpaichthys parauapiranga Ferreira, Ribeiro, Lima, Silva, Ferreira & Mirande 2024 | Genus Species | 123477 |
| Olyra parviocula Kosygin, Shangningam & Gopi, 2018 | Genus Species | |
| Opistognathus parvus Smith-Vaniz 2023 | Genus Species | 123477 |
| Glyptothorax pasighatensis Arunkumar, 2016 | Genus Species | |
| Pangio pathala Sundar, Arjun, Sidharthan, Dahanukar & Raghavan 2022 | Genus Species | 123477 |
| Ponticola patimari Eagderi, Nikmehr & Poorbagher, 2020 | Genus Species | |
| Akysis patrator Ng, Pawangkhanant & Suwannapoom 2022 | Genus Species | 123477 |
| Vanderhorstia pattiseery Allen, Erdmann & Ichida 2024 | Genus Species | 123477 |
| Urocampus paucianulus Araki & Motomura 2022 | Genus Species | 123477 |
| Eurycheilichthys paucidens Reis, 2017 | Genus Species | |
| Leptobotia paucipinna Guo, Cao & Zhang 2023 | Genus Species | 123477 |
| Rhinopetitia paucirastra Menezes & Netto-Ferreira, 2019 | Genus Species | |
| Schizodon paucisquamis Britski, Garavello & Ramirez 2023 | Genus Species | 123477 |
| Pariolius pax Faustino-Fuster, López-Castaño, Quiñones & Meza-Vargas 2024 | Genus Species | 123477 |
| Cetomimus paxtoni Kobyliansky, Gordeeva & Mishin 2023 | Genus Species | 123477 |
| Glyptothorax pedunculatus Roberts, 2021 | Genus Species | 123477 |
| Scomberoides pelagicus Abdussamad, Retheesh & Gopalakrishnan 2022 | Genus Species | 123477 |
| Gymnocypris pengquensis Tang, Feng, Wanghe, Li & Zhao, 2016 | Genus Species | |
| Schistura peninsulae Dvořák, Bohlen, Kottelat & Šlechtová 2023 | Genus Species | 123477 |
| Parotocinclus pentakelis Roxo, Messias & Silva, 2019 | Genus Species | |
| Cambeva pericoh Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Pseudolaguvia permaris Vijayakrishnan, Praveenraj & Mishra 2023 | Genus Species | 123477 |
| Scopelogadus perplexus Kotlyar, 2021 | Genus Species | 123477 |
| Caecogobius personatus Larson & Husana, 2018 | Genus Species | |
| Holanthias perumali Talwar, 1976 | Genus Species | 123477 |
| Saurenchelys petersi Day, 1878 | Genus Species | |
| Hyphessobrycon petricolus Ohara, Lima & Barros, 2017 | Genus Species | |
| Melanorivulus petrisecundi Costa, 2016 | Genus Species | |
| Nemacheilus pezidion Kottelat 2022 | Genus Species | 123477 |
| Opistognathus pholeter Smith-Vaniz 2023 | Genus Species | 123477 |
| Dysomma phuketensis Prokofiev, 2019 | Genus Species | |
| Rhinogobius phuongae Endruweit, 2018 | Genus Species | |
| Okamejei picta Ng, Ho, Joung & Liu 2023 | Genus Species | 123477 |
| Aperioptus pictorius Richardson, 1848 | Genus Species | |
| Kuiterichthys pietschi Arnold, 2013 | Genus Species | |
| Myroconger pietschi Espíndola, Caires, Tighe, de Pinna & Melo, 2021 | Genus Species | 123477 |
| Benthophilus pinchuki Ragimov, 1982 | Genus Species | |
| Sinocyclocheilus pingshanensis Li, Li, Lan & Wu, 2018 | Genus Species | |
| Hyphessobrycon piorskii Guimarães, Brito, Feitosa, Carvalho-Costa & Ottoni, 2018 | Genus Species | |
| Moenkhausia pirahan Mathubara & Toledo-Piza, 2020 | Genus Species | |
| Neoplecostomus pirangaensis Oliveira & Oyakawa, 2019 | Genus Species | |
| Cambeva piraquara Reis, Wosiacki, Ferrer, Donin & Graça 2023 | Genus Species | 123477 |
| Eurycheilichthys planus Reis, 2017 | Genus Species | |
| Hyphessobrycon platyodus Ohara, Abrahão & Espíndola, 2017 | Genus Species | |
| Neolissochilus pnar Dahanukar, Sundar, Rangad, Proudlove & Raghavan 2023 | Genus Species | 123477 |
| Cambeva podostemophila Costa, Feltrin & Katz 2023 | Genus Species | 123477 |
| Centrogenys pogonoskii Matsunuma & Johnson 2023 | Genus Species | 123477 |
| Parapercis pogonoskii Johnson & Worthington Wilmer, 2018 | Genus Species | |
| Chelidoperca pollux Matsunuma, Hoang, Tachihara, Hirasaka & Motomura 2024 | Genus Species | 123477 |
| Pethia pollux Conway, Pinion & Kottelat, 2021 | Genus Species | 123477 |
| Melanorivulus polychromus Nielsen, Aguiar Neves, Ywamoto & de Aguiar Passos, 2016 | Genus Species | |
| Luciobrotula polylepis Wong, Lee & Chen, 2021 | Genus Species | 123477 |
| Pseudogobio polysticta Tominaga & Kawase, 2019 | Genus Species | |
| Blennius ponticus Slastenenko, 1934 | Genus Species | |
| Horaglanis populi Raghavan, Sundar, Arjun, Britz & Dahanukar 2023 | Genus Species | 123477 |
| Thryssa porava Bleeker 1849 | Genus Species | 123477 |
| Pareuchiloglanis posteranalis Dao, Li, Yang & Zhou, 2020 | Genus Species | |
| Diapoma potamohadros Ito, Carvalho, Pavanelli, Vanegas-Ríos & Malabarba 2022 | Genus Species | 123477 |
| Dysalotus pouliulii Melo, 2017 | Genus Species | |
| Mystus prabini Darshan, Abujam, Kumar, Parhi, Singh, Vishwanath, Das & Pandey, 2019 | Genus Species | |
| Discoverichthys praecox Merrett & Nielsen, 1987 | Genus Species | |
| Olyra praestigiosa Ng & Ferraris, 2016 | Genus Species | |
| Yaluwak primus Lujan, Armbruster & Werneke, 2019 | Genus Species | |
| Glyptothorax primusplicae Shangningam & Kosygin 2023 | Genus Species | 123477 |
| Glyptothorax prionotos Ng & Kottelat 2023 | Genus Species | 123477 |
| Eleotris prismatica Bleeker, 1849 | Genus Species | |
| Hypselobarbus procerus Plamoottil 2022 | Genus Species | 123477 |
| Megaleporinus prochiloides Roberts, 2021 | Genus Species | 123477 |
| Coregonus profundus Selz, Dönz, Vonlanthen & Seehausen, 2020 | Genus Species | |
| Lestidium progressum Ege, 1953 | Genus Species | |
| Pantanodon propinquus Meinema & Huber 2023 | Genus Species | 123477 |
| Corydoras psamathos Tencatt, Ohara, Sousa & Britto 2022 | Genus Species | 123477 |
| Krusensterniella pseudomaculata Chernova 2022 | Genus Species | 123477 |
| Leptocephalus pseudomicrocephalus Van Utrecht, 1988 | Genus Species | 123477 |
| Gymnelus pseudosquamatus Chernova & Møller, 2021 | Genus Species | 123477 |
| Liobagrus pseudostyani Chen & Guo, 2021 | Genus Species | 123477 |
| Hyphessobrycon psittacus Dagosta, Marinho, Camelier & Lima, 2016 | Genus Species | |
| Parotocinclus pukuixe Silva-Junior & Zanata 2022 | Genus Species | 123477 |
| Chelidoperca pulchella Matsunuma, Hoang, Tachihara, Hirasaka & Motomura 2024 | Genus Species | 123477 |
| Devario pullatus Kottelat, 2020 | Genus Species | |
| Nemacheilus pullus Kottelat 2023 | Genus Species | 123477 |
| Characidium pumarinri Teixeira & Melo, 2020 | Genus Species | 123477 |
| Pareiorhaphis pumila Pereira & Reis 2022 | Genus Species | 123477 |
| Trichomycterus puna Fernández, Contrera & Bize 2023 | Genus Species | 123477 |
| Rhinogobius punctatus Oshima, 1926 | Genus Species | |
| Sinocyclocheilus punctatus Lan & Yang, 2017 | Genus Species | |
| Schizothorax puncticulatus Zhang, Zhao & Niu, 2019 | Genus Species | |
| Luciogobius punctilineatus Koreeda & Motomura 2022 | Genus Species | 123477 |
| Glyptothorax punyabratai Tenali, Sarkar, Chandran & Singh 2024 | Genus Species | 123477 |
| Palutrus pusillus Tortonese, 1976 | Genus Species | |
| Paracanthocobitis putaoensis Lin, Chen & Chen 2023 | Genus Species | 123477 |
| Rasbora pycnopeza Wilkinson & Tan, 2018 | Genus Species | |
| Geophagus pyrineusi Deprá, Ohara & Silva 2022 | Genus Species | 123477 |
| Geophagus pyrocephalus Chuctaya, Nitschke, Andrade, Wingert & Malabarba 2022 | Genus Species | 123477 |
| Barbodes pyrpholeos Tan & Husana, 2021 | Genus Species | 123477 |
| Sinogobius qilin Endruweit 2024 | Genus Species | 123477 |
| Triplophysa qingzhenensis Liu, Zeng & Gong 2022 | Genus Species | 123477 |
| Triplophysa qini Deng, Wang & Zhang 2022 | Genus Species | 123477 |
| Schindleria qizma Ahnelt, Macek & Robitzch 2023 | Genus Species | 123477 |
| Pimelodus quadratus Lucinda, Ribeiro & Lucena, 2016 | Genus Species | |
| Garra quangtriensis Nguyen, Vu & Nguyen, 2015 | Genus Species | |
| Hyphessobrycon quibdoensis Ardila Rodríguez 2022 | Genus Species | 123477 |
| Apteronotus quilombola Peixoto, Datovo, Menezes & Santana, 2021 | Genus Species | 123477 |
| Rineloricaria quilombola Chamon & Fichberg 2022 | Genus Species | 123477 |
| Glossogobius quindecimradiatus Endruweit 2024 | Genus Species | 123477 |
| Acentrogobius quinquemaculatus Allen, 2017 | Genus Species | |
| Trichomycterus quintus Costa, 2020 | Genus Species | 123477 |
| Yunnanilus qujinensis Du, Lu & Chen, 2015 | Genus Species | |
| Bathysphyraenops radhae Rajakrishnan, Rajeeshkumar, Cubelio & Prokofiev 2022 | Genus Species | 123477 |
| Capoeta raghazensis Eagderi & Mousavi-Sabet 2021 | Genus Species | 123477 |
| Noemacheilus rajasthanicus Mathur & Yazdani, 1971 | Genus Species | |
| Indoreonectes rajeevi Kumkar, Pise, Gorule, Verma & Kalous, 2021 | Genus Species | 123477 |
| Glaridoglanis ramosa Ng & Kottelat 2022 | Genus Species | 123477 |
| Physoschistura ranikhetensis Singh & Das, 2019 | Genus Species | |
| Scobinancistrus raonii Chaves, Oliveira, Gonçalves, Sousa & Rapp Py-Daniel 2023 | Genus Species | 123477 |
| Rhyacoglanis rapppydanielae Shibatta, Rocha & Oliveira 2021 | Genus Species | 123477 |
| Sturisoma rapppydanielae Londoño-Burbano & Britto 2023 | Genus Species | 123477 |
| Glyptothorax rara Chen & He 2024 | Genus Species | 123477 |
| Careproctus rausuensis Machi, Nobetsu & Yabe, 2012 | Genus Species | |
| Schistura rebuw Choudhury, Dey, Bharali, Sarma & Vishwanath, 2019 | Genus Species | |
| Birdsongichthys rectus Tornabene, Manning, Robertson, Van Tassell & Baldwin 2022 | Genus Species | 123477 |
| Melanorivulus regularis Costa, 2017 | Genus Species | |
| Profundulus rei Calixto-Rojas, Lira-Noriega, Rubio-Godoy, Pérez-Ponce de León et al. 2023 | Genus Species | 123477 |
| Sturisomatichthys reinae Londoño-Burbano & Reis, 2019 | Genus Species | |
| Scleromystax reisi Britto, Fukakusa & Malabarba, 2016 | Genus Species | |
| Sturisoma reisi Londoño-Burbano & Britto 2022 | Genus Species | 123477 |
| Salariopsis renatorum Yoğurtçuoğlu, Kaya, Atalay, Ekmekçi & Freyhof 2023 | Genus Species | 123477 |
| Hypostomus renestoi Zawadzki, da Silva & Troy, 2018 | Genus Species | |
| Clarias rennyae Low, Ng & Tan 2022 | Genus Species | 123477 |
| Moenkhausia restricta Soares & Benine, 2019 | Genus Species | |
| Aphredoderus retrodorsalis Muller & Simons 2024 | Genus Species | 123477 |
| Hyphessobrycon reyae Ardila Rodríguez 2022 | Genus Species | 123477 |
| Bryconops rheorubrum Silva-Oliveira, Sabaj Pérez, Ota, Rapp Py-Daniel, 2019 | Genus Species | |
| Poecilocharax rhizophilus Ohara, Pastana & Camelier 2022 | Genus Species | 123477 |
| Gagata rhodobarbus Bhakat & Sinha, 2019 | Genus Species | |
| Careproctus rhomboides Mori, Matsuzaki, Kai & Tashiro 2024 | Genus Species | 123477 |
| Gymnotus riberalta Craig, Correa-Roldán, Ortega, Crampton & Albert, 2018 | Genus Species | |
| Australoheros ricani Lucena, Kullander, Norén & Calegari 2023 | Genus Species | 123477 |
| Gobius ricasolii Di Caporiacco, 1935 | Genus Species | |
| Corydoras rikbaktsa Lima & Britto, 2020 | Genus Species | |
| Psalidodon rioparanaibanus Alves, Oliveira, Pasa & Kavalco, 2020 | Genus Species | 123477 |
| Eustomias robertsi Stewart, Kenaley & Sutton 2024 | Genus Species | 123477 |
| Eigenmannia robsoni Dutra, Ramos & Menezes 2022 | Genus Species | 123477 |
| Imparfinis robustus Cortés-Hernández, López-Castaño, Milani & DoNascimiento 2023 | Genus Species | 123477 |
| Rineloricaria rodriquezae Costa-Silva, Oliveira & Silva 2021 | Genus Species | 123477 |
| Moenkhausia rondoni Mathubara & Toledo-Piza, 2020 | Genus Species | |
| Sinocyclocheilus ronganensis Luo, Huang & Wen, 2016 | Genus Species | |
| Triplophysa rongduensis Mao, Zhao, Yu, Xiao & Zhou 2023 | Genus Species | 123477 |
| Microlepidogaster roseae Martins 2022 | Genus Species | 123477 |
| Aliteranodon rostratus Meinema & Huber 2023 | Genus Species | 123477 |
| Congochromis rotundiceps Wingi, Schedel & Schliewen 2022 | Genus Species | 123477 |
| Leptobotia rotundilobus Guo, Cao & Zhang 2023 | Genus Species | 123477 |
| Phenacorhamdia roxoi Silva, 2020 | Genus Species | |
| Synbranchus royal Sabaj Pérez, Arce H. & de Sousa 2022 | Genus Species | 123477 |
| Pectenocypris rubra Ahnelt, Wibowo & Prianto, 2019 | Genus Species | |
| Plectrogenium rubricauda Uesaka, Yamakawa, Matsunuma & Endo 2021 | Genus Species | 123477 |
| Mystus rubripinnis Vanarajan & Arunachalam, 2018 | Genus Species | |
| Knodus rufford Deprá, Ota, Vitorino Júnior & Ferreira, 2021 | Genus Species | 123477 |
| Plectranthias ryukyuensis Wada, Suzuki, Senou & Motomura, 2020 | Genus Species | |
| Brachychalcinus sabaji Garcia-Ayala, Lima, Gama & Benine 2024 | Genus Species | 123477 |
| Sternopygus sabaji Torgersen & Albert 2022 | Genus Species | 123477 |
| Curimatopsis sabana Melo, 2020 | Genus Species | |
| Macroramphosus sagifue Jordan & Starks, 1902 | Genus Species | |
| Macrorhamphosus sagifue Jordan & Starks, 1902 | Genus Species | |
| Gymnapogon sagittarius Yoshida, Kawai & Motomura, 2019 | Genus Species | |
| Trichomycterus sainthilairei Katz & Costa, 2021 | Genus Species | 123477 |
| Oxynoemacheilus sakaryaensis Turan, Aksu & Kalayci 2023 | Genus Species | 123477 |
| Doboatherina salangensis Sasaki, Kimura & Satapoomin, 2019 | Genus Species | |
| Pareuchiloglanis salicesbarba Dao, Li, Yang & Zhou, 2020 | Genus Species | |
| Schizothorax saltans Turdakov, 1955 | Genus Species | |
| Hypergastromyzon sambas Tan, 2021 | Genus Species | 123477 |
| Barbus samniticus Lorenzoni, Carosi, Quadroni, De Santis, Vanetti, Delmastro & Zaccara, 2021 | Genus Species | 123477 |
| Trichomycterus sanchezi Ardila Rodríguez 2024 | Genus Species | 123477 |
| Puntius sanctus Plamoottil, 2020 | Genus Species | |
| Glossogobius sandakanensis Inger, 1957 | Genus Species | |
| Triplophysa sanduensis Chen & Peng, 2019 | Genus Species | |
| Leptopanchax sanguineus Costa, 2019 | Genus Species | |
| Cobitis saniae Eagderi, Jouladeh-Roudbar, Jalili, Sayyadzadeh & Esmaeili, 2017 | Genus Species | |
| Hypomasticus santanai Birindelli & Melo, 2020 | Genus Species | |
| Salminus santosi Lima 2022 | Genus Species | 123477 |
| Sinocyclocheilus sanxiaensis Jiang, Li, Yang & Chang, 2019 | Genus Species | |
| Bryconops sapezal Wingert, Chuctaya & Malabarba, 2018 | Genus Species | |
| Trichomycterus saquarema Costa, Katz, Vilardo & Amorim 2022 | Genus Species | 123477 |
| Sternopygus sarae Torgersen, Galindo-Cuervo, Reis & Albert 2023 | Genus Species | 123477 |
| Careproctus sarasa Tanaka, 1916 | Genus Species | |
| Glyptothorax sardashtensis Jokar, Kamangar, Ghaderi & Freyhof 2023 | Genus Species | 123477 |
| Coregonus sarnensis Selz & Seehausen 2023 | Genus Species | 123477 |
| Oxynoemacheilus sarus Freyhof, Yoğurtçuoğlu & Kaya, 2021 | Genus Species | 123477 |
| Johnius sasakii Hanafi, Chen, Seah, Chang, Liu & Chao 2022 | Genus Species | 123477 |
| Paracanthopoma satanica de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Hyphessobrycon sateremawe Faria, Bastos, Zuanon & Lima, 2020 | Genus Species | |
| Dichichthys satoi White, Stewart, O’Neill & Naylor 2024 | Genus Species | 123477 |
| Trichomycterus saturatus Costa, Katz & Azevedo-Santos 2023 | Genus Species | 123477 |
| Orthopristis scapularis Fowler, 1915 | Genus Species | |
| Reptiliceps scarlatoi Prokofiev, 2007 | Genus Species | |
| Microdous scharpfi Endruweit 2024 | Genus Species | 123477 |
| Careproctus schmidti Chernova, Vedischeva & Datskii, 2021 | Genus Species | 123477 |
| Ruanoho scurra Stewart, Knudsen & Clements, 2021 | Genus Species | 123477 |
| Exostoma sectile Ng & Kottelat, 2018 | Genus Species | |
| Barbodes sellifer Kottelat & Lim 2021 | Genus Species | 123477 |
| Squalius semae Turan, Kottelat & Bayçelebi, 2017 | Genus Species | |
| Exostoma sentiyonoae Shangningam & Limatemjen 2024 | Genus Species | 123477 |
| Plectrogenium serratum Matsunuma, Uesaka, Yamakawa & Endo 2021 | Genus Species | 123477 |
| Hypostomus sertanejo Zawadzki, Ramos & Sabaj Pérez, 2017 | Genus Species | |
| Satanoperca setepele Ota, Deprá, Kullander, Graça & Pavanelli 2022 | Genus Species | 123477 |
| Triplophysa shannanensis Wang, Huang, Chen & He 2024 | Genus Species | 123477 |
| Triplophysa shashiguii Wu & Guo, 2021 | Genus Species | 123477 |
| Tanichthys shenzhenensis Jin, Li & Zhao 2022 | Genus Species | 123477 |
| Tyttobrycon shibattai Abrahão, Pastana & Marinho, 2019 | Genus Species | |
| Careproctus shigemii Matsuzaki, Mori, Kamiunten, Yanagimoto & Kai, 2020 | Genus Species | |
| Labeo shivamogaensis Arunachalam, Anusha & Sivakumar, 2018 | Genus Species | |
| Ancistrus shuar Provenzano & Barriga Salazar, 2018 | Genus Species | |
| Oreonectes shuilongensis Deng, Xiao, Hou & Zhou, 2016 | Genus Species | |
| Eustomias shunyo Kimura, Tsuda & Nakayama 2023 | Genus Species | 123477 |
| Toxotes siamensis Kottelat & Tan, 2018 | Genus Species | |
| Macrognathus siangensis Arunkumar, 2016 | Genus Species | |
| Opsarius siangi Kumari, Borah, Nair & Suresh 2024 | Genus Species | 123477 |
| Leporinus sidlauskasi Britski & Birindelli, 2019 | Genus Species | |
| Brachychalcinus signatus Garcia-Ayala & Benine, 2020 | Genus Species | |
| Phenacostethus sikat Parenti, Lumbantobing & Haryono 2023 | Genus Species | 123477 |
| Sinocyclocheilus simengensis Li, Wu, Li & Lan, 2018 | Genus Species | |
| Ecsenius similis Allen & Erdmann 2024 | Genus Species | 123477 |
| Acyrtus simon Gasparini & Pinheiro 2022 | Genus Species | 123477 |
| Rasbora simonbirchi Britz & Tan, 2018 | Genus Species | |
| Apogon simplex De Vis, 1884 | Genus Species | |
| Neopomacentrus simulatus Allen & Erdmann 2024 | Genus Species | 123477 |
| Pegasus sinensis Zhang, Zhang, Ma, Liu, Lin & Wang 2022 | Genus Species | 123477 |
| Zacco sinensis Zhu, Yu & Liu, 2020 | Genus Species | |
| Pillaiabrachia siniae Britz, 2016 | Genus Species | |
| Eigenmannia sirius Peixoto & Ohara, 2019 | Genus Species | |
| Coregonus skrjabini Karasev 1987 | Genus Species | 123477 |
| Romanogobio skywalkeri Friedrich, Wiesner, Zangl, Daill, Freyhof & Koblmüller, 2018 | Genus Species | |
| Monhoplichthys smithi Fowler, 1938 | Genus Species | |
| Chondrostoma smyrnae Küçük, Çiftçi, Güçlü & Turan, 2021 | Genus Species | 123477 |
| Neobythites solomonensis Uiblein & Nielsen, 2021 | Genus Species | 123477 |
| Garra songbangensis Nguyen, Vu & Nguyen, 2015 | Genus Species | |
| Scorpaena sororreginae Wibowo & Motomura, 2021 | Genus Species | 123477 |
| Cetopsorhamdia spilopleura Bockmann & Reis, 2021 | Genus Species | 123477 |
| Acentrogobius spilopterus Smith, 1932 | Genus Species | |
| Melanorivulus spixi Costa, 2016 | Genus Species | |
| Krusensterniella squamosa Chernova 2022 | Genus Species | 123477 |
| Bassozetus squamosus Tomiyama, Takami & Fukui, 2021 | Genus Species | 123477 |
| Schindleria squirei Robitzch, Landaeta & Ahnelt 2023 | Genus Species | 123477 |
| Schistura stala Endruweit, 2017 | Genus Species | |
| Vanderhorstia stegauchenia Prokofiev, 2017 | Genus Species | |
| Coregonus steinmanni Selz, Dönz, Vonlanthen & Seehausen, 2020 | Genus Species | |
| Chimaera stellata Teramura, Senou & Hirase 2024 | Genus Species | 123477 |
| Spectrunculus stenostio Uiblein, Møller & Nielsen 2023 | Genus Species | 123477 |
| Microctenopoma steveboyesi Skelton, Stauffer, Chakona & Wisor, 2021 | Genus Species | 123477 |
| Microctenopoma stevenorrisi Skelton, Stauffer, Chakona & Wisor, 2021 | Genus Species | 123477 |
| Moenkhausia sthenosthoma Petrolli & Benine, 2015 | Genus Species | |
| Mustura subhashi Choudhury, Das, Bharali, Sarma, Tyagi, Lal & Sarma, 2021 | Genus Species | 123477 |
| Pterocryptis subrisa Ng, Lalramliana & Lalronunga, 2018 | Genus Species | |
| Garra substrictorostris Roni & Vishwanath, 2018 | Genus Species | |
| Devario subviridis Kottelat, 2020 | Genus Species | |
| Trichomycterus sucrensis Ardila Rodríguez, 2018 | Genus Species | |
| Phenacorhamdia suia Silva, Ochoa & Castro 2022 | Genus Species | 123477 |
| Grallenia sundaensis Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Toxotes sundaicus Kottelat & Tan, 2018 | Genus Species | |
| Neobythites superocellatus Uiblein & Nielsen 2023 | Genus Species | 123477 |
| Coregonus supersum Selz & Seehausen 2023 | Genus Species | 123477 |
| Garra surgifrons Zhou & Sun, 2018 | Genus Species | |
| Garra surinbinnani Page, Ray, Tongnunui, Boyd & Randall, 2019 | Genus Species | |
| Coregonus suspensus Selz & Seehausen 2023 | Genus Species | 123477 |
| Capoeta svanetica Roman, Afanasyev, Golub & Lietytska 2022 | Genus Species | 123477 |
| Parapsilorhynchus swaini Baliarsingh & Kosygin, 2017 | Genus Species | |
| Phallobrycon synarmacanthus Netto-Ferreira, Bastos, Sousa & Menezes, 2016 | Genus Species | |
| Schistura syngkai Choudhury, Mukhim, Dey, Warbah & Sarma, 2019 | Genus Species | |
| Schistura systomos Kottelat, 2017 | Genus Species | |
| Glossogobius szechuanensis Tchang, 1939 | Genus Species | |
| Lamnostoma taiwanense Chiu, Huang & Shao, 2018 | Genus Species | |
| Schistura tamduongensis Nguyen, Nguyen & Nguyen, 2009 | Genus Species | |
| Cyphocharax tamuya Dutra, Vita, Gentile, Ochoa & Netto-Ferreira 2022 | Genus Species | 123477 |
| Panaqolus tankei Cramer & Sousa, 2016 | Genus Species | |
| Trichomycterus tantalus Reis, Vieira & de Pinna 2022 | Genus Species | 123477 |
| Thayeria tapajonica Moreira & Lima, 2017 | Genus Species | |
| Microphilypnus tapajosensis Caires, 2013 | Genus Species | |
| Myloplus taphorni Andrade, López-Fernández & Liverpool, 2019 | Genus Species | |
| Characidium tapuia Zanata, Ramos & Oliveira-Silva, 2018 | Genus Species | |
| Mustura taretensis Chinglemba, Rameshori & Vishwanath 2021 | Genus Species | 123477 |
| Squalius tartessicus Doadrio, Sousa-Santos & Perea 2023 | Genus Species | 123477 |
| Characidium tatama Agudelo-Zamora, Tavera, Murillo & Ortega-Lara, 2020 | Genus Species | |
| Astyanax taurorum Lucena, Zaluski & Lucena, 2017 | Genus Species | |
| Stolephorus taurus Hata, Lavoué & Motomura 2022 | Genus Species | 123477 |
| Creteuchiloglanis tawangensis Darshan, Abujam, Wangchu, Kumar, Das & Kumar Imotomba, 2019 | Genus Species | |
| Cordylancistrus tayrona Provenzano, Milani & Ardila Rodríguez, 2017 | Genus Species | |
| Pseudohomaloptera tecta Randall, Somarriba, Tongnunui & Page 2022 | Genus Species | 123477 |
| Indoreonectes telanganaensis Prasad, Srinivasulu, Srinivasulu, Anoop & Dahanukar, 2020 | Genus Species | |
| Leporinus tepui Birindelli, Britski & Provenzano, 2019 | Genus Species | |
| Ophichthys terricolus Britz, Standing, Gower & Kamei 2023 | Genus Species | 123477 |
| Strophidon tetraporus Huang, Mohapatra, Thu, Chen & Liao, 2020 | Genus Species | |
| Trichomycterus tetuanensis García-Melo, Villa-Navarro & DoNascimiento, 2016 | Genus Species | |
| Syngnathus texanus Gilbert, 2013 | Genus Species | |
| Dionda texensis Girard, 1856 | Genus Species | |
| Garra tezuensis Thoidingjam, Ngangbam, Linthoingambi & Singh 2023 | Genus Species | 123477 |
| Henicorhynchus thaitui Nguyen, Ho, Hoang, Wu & Zhang, 2020 | Genus Species | |
| Melanostigma thalassium Orlovskaya & Balushkin, 2019 | Genus Species | |
| Corydoras thanatos Tencatt, Ohara, Sousa & Britto 2022 | Genus Species | 123477 |
| Ambassis thermalis Cuvier, 1829 | Genus Species | |
| Loricaria thomasi Provenzano & Sabaj 2024 | Genus Species | 123477 |
| Ariosoma thoothukudiense Kodeeswaran, Kathirvelpandian, Mohapatra & Kumar 2024 | Genus Species | 123477 |
| Triplophysa tianxingensis Yang, Li & Chen, 2016 | Genus Species | |
| Zacco tiaoxiensis Zhang, Zhou & Yang 2023 | Genus Species | 123477 |
| Exostoma tibetana Gong, Lin, Liu & Liu, 2018 | Genus Species | |
| Dario tigris Britz, Kullander & Rüber 2022 | Genus Species | 123477 |
| Homatula tigris Che, Dao, Chen, Pan, Hua, Liang & Wang 2023 | Genus Species | 123477 |
| Osteobrama tikarpadaensis Shangningam, Rath, Tudu & Kosygin, 2020 | Genus Species | |
| Schistura titan Kottelat, 2017 | Genus Species | |
| Tembeassu titanicus Peixoto, Campos-da-Paz, Menezes, de Santana, Triques & Datovo 2022 | Genus Species | 123477 |
| Pareiorhaphis togoroi Oliveira & Oyakawa, 2019 | Genus Species | |
| Lefua tokaiensis Ito, Hosoya & Miyazaki, 2019 | Genus Species | |
| Eleotris tolsoni Bleeker, 1854 | Genus Species | 123477 |
| Careproctus tomiyamai Murasaki, Kai, Endo & Fukui 2022 | Genus Species | 123477 |
| Silurus tomodai Hibino & Tabata, 2018 | Genus Species | |
| Anabas tongtruongensis Nguyen, Ngô & Nguyen, 2015 | Genus Species | |
| Terelabrus toretore Shepherd, Pinheiro, Phelps, Siu & Rocha 2023 | Genus Species | 123477 |
| Pareiorhaphis torrenticola Pereira, Pessali & Reis 2024 | Genus Species | 123477 |
| Cambeva tourensis Costa, Feltrin & Katz 2023 | Genus Species | 123477 |
| Bassozetus trachibranchus Tomiyama, Takami & Fukui, 2021 | Genus Species | 123477 |
| Paralepidocephalus translucens Liu, Yang & Chen, 2016 | Genus Species | |
| Garra triangularis Shangningam, Rath & Kosygin, 2021 | Genus Species | 123477 |
| Coelorinchus tricristiger Prokofiev & Iwamoto 2022 | Genus Species | 123477 |
| Obliquogobius trifasciatus Fujiwara & Shibukawa 2022 | Genus Species | 123477 |
| Opistognathus triops Smith-Vaniz 2023 | Genus Species | 123477 |
| Schizodon trivittatus Garavello, Ramirez, Oliveira, Britski, Birindelli & Galetti 2021 | Genus Species | 123477 |
| Dellichthys trnskii Conway, Stewart & Summers, 2018 | Genus Species | |
| Paracanthopoma truculenta de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Mastacembelus truttoides Endruweit 2024 | Genus Species | 123477 |
| Cottus tubulatus Hubbs & Schultz 1932 | Genus Species | 123477 |
| Hemiodus tucupi Silva, Nogueira, Netto-Ferreira, Akama & Dutra, 2020 | Genus Species | |
| Phoxinus tumensis Luo, 1996 | Genus Species | |
| Paracanthocobitis tumitensis Arunkumar & Moyon, 2019 | Genus Species | |
| Myloplus tumukumak Andrade, Jégu & Gama, 2018 | Genus Species | |
| Pteragogus turdus Iino & Motomura 2022 | Genus Species | 123477 |
| Loricaria turi Saraiva, Abreu, Ottoni & Piorski, 2021 | Genus Species | 123477 |
| Chondrostoma turnai Güçlü, Küçük, Turan, Çiftçi & Mutlu, 2018 | Genus Species | |
| Drombus tutuilae Jordan & Seale, 1906 | Genus Species | |
| Fagasa tutuilae Schultz, 1943 | Genus Species | |
| Aspasma ubauo Fujiwara & Motomura, 2019 | Genus Species | |
| Trichomycterus uberabensis Costa, Azevedo-Santos & Katz 2023 | Genus Species | 123477 |
| Tamanka umbra Herre, 1927 | Genus Species | |
| Melamphaes uniformis Kotlyar, 2013 | Genus Species | |
| Dinotopterygium uniodon Frainer, Carvalho, Bertaco & Malabarba 2021 | Genus Species | 123477 |
| Cambeva urubici Costa, Feltrin & Katz, 2021 | Genus Species | 123477 |
| Listrura urussanga Costa, Feltrin & Katz 2023 | Genus Species | 123477 |
| Dawkinsia uttara Katwate, Apte & Raghavan, 2020 | Genus Species | |
| Eurycheilichthys vacariensis Reis, 2017 | Genus Species | |
| Aulopareia vadosa Larson & Jaafar 2022 | Genus Species | 123477 |
| Trichomycterus valleduparensis Ardila Rodríguez, 2018 | Genus Species | |
| Paracanthopoma vampyra de Pinna & Dagosta 2022 | Genus Species | 123477 |
| Psilotris vantasselli Tornabene & Baldwin, 2019 | Genus Species | |
| Hyphessobrycon vanzolinii Lima & Flausino Junior, 2016 | Genus Species | |
| Pomacentrus variegatus Allen, Erdmann & Utama 2024 | Genus Species | 123477 |
| Cetopsis varii Abrahão & de Pinna, 2018 | Genus Species | |
| Gelanoglanis varii Calegari & Reis, 2016 | Genus Species | |
| Nematocharax varii Barreto, Silva, Batalha‐Filho, Affonso & Zanata, 2018 | Genus Species | |
| Rhyacoglanis varii Shibatta & Souza-Shibatta 2023 | Genus Species | 123477 |
| Sturisomatichthys varii Londoño-Burbano & Reis, 2019 | Genus Species | |
| Glyptothorax vatandousti Jouladeh-Roudbar, Ghanavi & Freyhof 2023 | Genus Species | 123477 |
| Enneapterygius velatus Tashiro, Senou & Motomura, 2018 | Genus Species | |
| Hypostomus velhomonge Lustosa-Costa, Ramos, Zawadzki & Lima 2022 | Genus Species | 123477 |
| Cambeva ventropapillata Costa, Feltrin, Mattos, Dalcin, Abilhoa & Katz 2023 | Genus Species | 123477 |
| Cryptocentrus venustus Seale 1914 | Genus Species | 123477 |
| Hyphessobrycon veredus Teixeira, Dutra, Penido, Santos & Pessali, 2019 | Genus Species | |
| Squalius verepi Turan 2022 | Genus Species | 123477 |
| Lioscorpius vermiculatus Wada & Motomura 2022 | Genus Species | 123477 |
| Nomorhamphus versicolor Kraemer, Hadiaty & Herder, 2019 | Genus Species | |
| Scorpaena vesperalis Wibowo & Motomura, 2020 | Genus Species | |
| Pareiorhaphis vetula Pereira, Lehmann A. & Reis, 2016 | Genus Species | |
| Giuris viator Keith, Mennesson, Lord & Hubert, 2020 | Genus Species | 123477 |
| Sebastiscus vibrantus Morishita, Kawai & Motomura, 2018 | Genus Species | |
| Discordipinna vibrissa Allen & Erdmann 2024 | Genus Species | 123477 |
| Psammogobius viet Prokofiev, 2016 | Genus Species | |
| Ophichthus vietnamensis Vo, Hibino & Ho, 2019 | Genus Species | |
| Opistognathus vigilax Smith-Vaniz 2023 | Genus Species | 123477 |
| Atherina villosa Duncker & Mohr, 1926 | Genus Species | |
| Leptonotus vincentae Luzzatto & Estalles, 2019 | Genus Species | |
| Trichomycterus vinnulus Reis & de Pinna 2022 | Genus Species | 123477 |
| Pantosteus virescens Cope, 1875 | Genus Species | |
| Ctenogobius virgatulus Jordan & Snyder, 1901 | Genus Species | |
| Salar virginalis Girard, 1856 | Genus Species | 123477 |
| Astyanax viridis Salgado, 2021 | Genus Species | 123477 |
| Glyptothorax viridis Shangningam & Kosygin 2023 | Genus Species | 123477 |
| Trichomycterus vitalbrazili Vilardo, Katz & Costa, 2020 | Genus Species | |
| Tridens vitreus Henschel, Ohara & Costa 2023 | Genus Species | 123477 |
| Macrurus vittatus Weber, 1913 | Genus Species | |
| Brycon vonoi Lima, 2017 | Genus Species | |
| Glyptothorax waikhomi Shangningam & Kosygin 2022 | Genus Species | 123477 |
| Physoschistura walongensis Tamang & Sinha, 2016 | Genus Species | |
| Grallenia wandammenensis Allen, Erdmann & Cahyani 2024 | Genus Species | 123477 |
| Platysmacheilus wangcangensis Chen, Yang & Guo, 2021 | Genus Species | 123477 |
| Characidium wangyapoik Armbruster, Lujan & Bloom, 2021 | Genus Species | 123477 |
| Opistognathus wassi Smith-Vaniz 2023 | Genus Species | 123477 |
| Microcambeva watu Medeiros, Sarmento-Soares & Lima, 2021 | Genus Species | 123477 |
| Triplophysa weiheensis Feng, Zhang, Tong, Zhou & Zhao, 2020 | Genus Species | |
| Bibarba wenliuensis Yang, Chen & Li, 2020 | Genus Species | |
| Sinocyclocheilus wenshanensis Li, Yang, Li & Chen, 2017 | Genus Species | |
| Hadropterus westfalli Fowler, 1942 | Genus Species | |
| Halicmetus westraliensis Ho & Last, 2018 | Genus Species | |
| Heteroclinus whitleyi Hoese, Hay & Dibattista 2024 | Genus Species | 123477 |
| Callogobius williamsi Delventhal & Mooi 2023 | Genus Species | 123477 |
| Hannia wintoni Shelley, Delaval, Le Feuvre, Dempster, Raadik & Swearer, 2020 | Genus Species | |
| Lasiancistrus wiwa Poveda-Cuellar, Conde-Saldaña, Villa-Navarro, Lujan & Santos 2023 | Genus Species | 123477 |
| Trichomycterus wiwa Ardila Rodríguez, 2018 | Genus Species | |
| Triplophysa wudangensis Liu, Zeng & Gong 2022 | Genus Species | 123477 |
| Eleotris wuhanlini Endruweit 2024 | Genus Species | 123477 |
| Triplophysa wulongensis Chen, Sheraliev, Shu & Peng, 2021 | Genus Species | 123477 |
| Hypseleotris wunduwala Shelley, Delaval & Le Feuvre 2023 | Genus Species | 123477 |
| Barbus xanthos Güçlü, Kalayci, Küçük & Turan, 2020 | Genus Species | |
| Etheostoma xanthovum Wood & Near 2023 | Genus Species | 123477 |
| Cirrhilabrus xanthozonus Allen, Erdmann & Utama 2024 | Genus Species | 123477 |
| Hemigrammus xaveriellus Lima, Urbano-Bonilla & Prada-Pedreros, 2020 | Genus Species | |
| Halieutaea xenoderma Prokofiev, 2020 | Genus Species | |
| Triplophysa xichouensis Liu, Pan, Yang & Chen, 2017 | Genus Species | |
| Sinocyclocheilus xingyiensis Luo, Tang, Deng, Duan & Zhang 2024 | Genus Species | 123477 |
| Triplophysa xuanweiensis Lu, Li, Mao & Zhao 2022 | Genus Species | 123477 |
| Cobitis xui Tan, Li, Wu & Yang, 2019 | Genus Species | |
| Urocampus yaeyamaensis Araki, Shibukawa & Motomura 2022 | Genus Species | 123477 |
| Mastiglanis yaguas Faustino-Fuster & Ortega, 2020 | Genus Species | |
| Pimelodella yaharo Conde-Saldaña, Albornoz-Garzón, García-Melo, Dergam & Villa-Navarro, 2019 | Genus Species | |
| Giuris yahayai Keith & Mennesson, 2020 | Genus Species | 123477 |
| Garra yajiangensis Gong, Freyhof, Wang, Liu, Liu, Lin, Jiang & Liu, 2018 | Genus Species | |
| Triplophysa yajiangensis Yan, Sun & Guo, 2015 | Genus Species | |
| Parotocinclus yaka Lehmann A., Lima & Reis, 2018 | Genus Species | |
| Ostorhinchus yamato Yoshida, Hayashi & Motomura, 2018 | Genus Species | |
| Mustura yangi Qin, Kottelat, Kyaw & Chen 2022 | Genus Species | 123477 |
| Yunnanilus yangi He, Li, Che, Yang, Wang & Wang 2024 | Genus Species | 123477 |
| Crenicichla yjhui Piálek, Casciotta, Almirón & Říčan, 2019 | Genus Species | |
| Kopua yoko Fujiwara, Okamoto & Motomura, 2018 | Genus Species | |
| Doboatherina yoshinoi Sasaki & Kimura, 2019 | Genus Species | |
| Knodus ytuanama Ferreira & Ohara 2023 | Genus Species | 123477 |
| Luciogobius yubai Ikeda, Tamada & Hirashima, 2019 | Genus Species | |
| Glyptothorax yuensis Shangningam & Kosygin 2022 | Genus Species | 123477 |
| Pimelodus yuma Villa-Navarro & Acero P., 2017 | Genus Species | |
| Hemiculter yungaoi Vasil'eva, Vasil'ev & Shedko 2022 | Genus Species | 123477 |
| Barbodes yunnanensis Tsü, 1977 | Genus Species | |
| Fivepearlus yunnanensis Li, Yang, Li & Chen, 2017 | Genus Species | |
| Triplophysa yuzeshengi Guo & Sun, 2021 | Genus Species | 123477 |
| Barbodes zakariaismaili Kottelat & Lim 2021 | Genus Species | 123477 |
| Trichomycterus zapatocaensis Ardila Rodríguez 2023 | Genus Species | 123477 |
| Ophidion zavalai Rotundo, Caires, Oliveira, Kuranaka, Figueiredo-Filho & Marceniuk 2023 | Genus Species | 123477 |
| Rineloricaria zawadzkii Costa-Silva, Silva & Oliveira 2022 | Genus Species | 123477 |
| Eigenmannia zenuensis Herrera-Collazos, Galindo-Cuervo, Maldonado-Ocampo & Rincón-Sandoval, 2020 | Genus Species | |
| Bothrocara zesta Jordan & Fowler, 1902 | Genus Species | |
| Sinocyclocheilus zhenfengensis Liu, Deng, Ma, Xiao & Zhou, 2018 | Genus Species | |
| Coelorinchus zinjianus Prokofiev & Iwamoto 2023 | Genus Species | 123477 |
| Terelabrus zonalis Fukui, 2018 | Genus Species | |
| Nemacheilus zonatus Page, Pfeiffer, Suksri, Randall & Boyd, 2020 | Genus Species | |
| Neobythites zora Uiblein & Nielsen 2023 | Genus Species | 123477 |
| Eustomias zygolampas Prokofiev, 2019 | Genus Species |