Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Atheriniformes (Silversides) >
Melanotaeniidae (Rainbowfishes, blue eyes)
Etymology: Melanotaenia: Greek, melan, -anos = black + latin, taenia = stripe (Ref. 45335); mairasi: Named for the tribe of the traditional land owners of the type locality.
Eponymy: Mairasi is the tribal name of the local landowners of the type locality, in Indonesian New Guinea. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; depth range 0 - 3 m (Ref. 87110). Tropical
Asia: Lake Furnusu, West Papua in Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.4 cm SL (female)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 4 - 6; Dorsal soft rays (total): 11 - 13; Anal spines: 1 - 2; Anal soft rays: 16 - 19. This species of the maccullochi group of rainbowfishes is distinguished by the following set of characters: D IV-VI-I,11 to 13 (usually 11); A I-II,16–19 (usually I,18-19); pectoral rays 12-14 (usually 13-14); lateral scales 32-34 (usually 34); gill rakers on lower limb of first gill arch 15-17. Colour in life brownish dorsally and white ventrally with mid-lateral blackish stripe from eye to caudal-fin base, narrow red stripe between each scale row of body, and orange scale margins (Ref. 87110).
Cross section: compressed.
Specimens were collected adjacent to a rocky shore among aquatic vegetation and submerged Pandanus roots. Except for the holotype, only juveniles were collected, but adult fish were observed among dense vegetation at depths below 2 to 3 m. Other species present in the lake were provisionally identified as follows: Neosilurus brevidorsalis (Plotosidae), Craterocephalus fistularis (Atherinidae), Mogurnda new species (Eleotridae), and Oxyeleotris nullipora (Eleotridae) (Ref. 87110).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Allen, G.R. and R.K. Hadiaty, 2011. A new species of rainbowfish (Melanotaeniidae), from western New Guinea (West Papua Province, Indonesia). Journal of the Australia New Guinea Fishes Association 25(1):602-607. (Ref. 87110)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: of potential interest; aquarium: potential
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