HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesPygmy triplefin Pygmy triplefin (Enneapterygius nanus) Scientific name: Enneapterygius nanus Schultz, 1960 The Pygmy triplefin (Enneapterygius nanus) is a marine fish of the family Tripterygiidae. Native range: Pacific Ocean, Taiwan and northwestern Australia to Rapa, south to New Caledonia. BiologyDorsal spines (total): 14 - 16; Dorsal soft rays (total): 9-10; Anal spines: 1; Anal soft rays: 16 - 19. Semi-transparent with indistinct oblique pale and dusky bands on the body. Males are heavily pigmented under the head.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEnneapterygius nanusFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.0Depth range1–30 m (3–98 ft)EnvironmentMarine; reef-associated; depth range 1 - 30 mClimateTropicalDistributionPacific Ocean: Taiwan and northwestern Australia to Rapa, south to New Caledonia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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