Classification / Names
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Blenniiformes (Blennies) >
Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Helcogramma: Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref. 45335); serendip: Named after Sri Lanka’s old Arabic name ‘Sarandib’, or ‘Serendip’ in English. Also named after serendipitous discovery of several new species. The epithet is used as a noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
Ecologia
marino benthopelagico. Tropical
Eastern Indian Ocean: Sri Lanka.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 2.5 cm SL maschio/sesso non determinato; (Ref. 75031)
Short description
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 16; Raggi dorsali molli (totale) : 10; Spine anali: 1; Raggi anali molli: 18 - 19; Vertebre: 35. Diagnosis: A small (< 2.5 cm SL) species of the genus. Dorsal fin III + XIII+ 10, 1st fin low; anal fin I, 19; pectoral rays 16 (2+7+7); pelvic fin I, 2, spine short and hidden, segmented rays simple, partially united by membrane. Vertebrae 10+25. LL total lateral scales 37-38; tubed 20-22 (21), ends below junction of 2nd and 3rd dorsal fin; nape and anterior anal-fin bases scaleless, caudal-fin base with 2 rows of scales. Mandibular pores 4+1+4. Orbital cirrus pointed, small. Posterior margin of orbit and edges of occipital sensory canals with minute serrations. Head length 3.6 in SL; eye 2.8, maxilla 2.4 in HL. Live color not known. Male head with stripe below eyes, from upper lip to opercle and pectoral-fin base. Females with H-bars on body (Ref. 75031).
Collected from rocky bottoms (Ref. 75031). Female members of the Tripterygiidae have eggs that are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114).
Life cycle and mating behavior
Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve
Holleman, W., 2007. Fishes of the genus Helcogramma (Blennioidei: Tripterygiidae) in the Western Indian Ocean, including Sri Lanka, with description of four new species. Smith. Bull. 7:51-81. (Ref. 75031)
IUCN Red List Status (Ref. 130435)
Human uses
Strumenti
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00258 - 0.01228), b=3.08 (2.89 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Resilienza (Ref.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
