HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesBlackbelly triplefin Blackbelly triplefin (Enneapterygius fuscoventer) Scientific name: Enneapterygius fuscoventer Fricke, 1997 The Blackbelly triplefin (Enneapterygius fuscoventer) is a marine fish of the family Tripterygiidae. Native range: Western Pacific, Taiwan, Philippines, Papua New Guinea, Fiji, American Samoa, and Society Islands (French Polynesia). Species factsScientific nameEnneapterygius fuscoventerFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length2.3Depth range0–5 m (0–16 ft)EnvironmentMarine; reef-associated; depth range 0 - 5 mClimateTropicalDistributionWestern Pacific: Taiwan, Philippines, Papua New Guinea, Fiji, American Samoa, and Society Islands (French Polynesia).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