HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesHooded triplefin Hooded triplefin (Helcogramma capidata) Scientific name: Helcogramma capidata Rosenblatt, 1960 The Hooded triplefin (Helcogramma capidata) is a marine fish of the family Tripterygiidae. Native range: Western Central Pacific, widespread on the Pacific Plate, also Indonesia to Fiji, Niue, and American Samoa. BiologyDorsal spines (total): 16 - 18; Dorsal soft rays (total): 10-12; Anal spines: 1; Anal soft rays: 19 - 21. Males are dark-headed.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHelcogramma capidataFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.7Depth range0–15 m (0–49 ft)EnvironmentMarine; reef-associated; depth range 0 - 15 m, usually ? - 10 mClimateTropicalDistributionWestern Central Pacific: widespread on the Pacific Plate, also Indonesia to Fiji, Niue, and American Samoa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026