HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesOnespot triplefin Onespot triplefin (Enneapterygius unimaculatus) Scientific name: Enneapterygius unimaculatus Fricke, 1994 The Onespot triplefin (Enneapterygius unimaculatus) is a marine fish of the family Tripterygiidae. Native range: Western Pacific, Taiwan, Philippines, Malaysia, Indonesia, Papua New Guinea, and Palau. Species factsScientific nameEnneapterygius unimaculatusFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.1Depth range0–4 m (0–13 ft)EnvironmentMarine; demersal; depth range 0 - 4 mClimateSubtropicalDistributionWestern Pacific: Taiwan, Philippines, Malaysia, Indonesia, Papua New Guinea, and Palau.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