HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesRedcap Triplefin Redcap Triplefin (Enneapterygius rufopileus) Scientific name: Enneapterygius rufopileus Waite, 1904 The Redcap Triplefin (Enneapterygius rufopileus) is a marine fish of the family Tripterygiidae. Species factsScientific nameEnneapterygius rufopileusFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.6Depth range0–6 m (0–20 ft)EnvironmentMarine; demersal; non-migratory; depth range 0 - 6 mClimateTropicalDistributionSouthwest Pacific: Australia, New Caledonia (including the Loyalty Islands), Fiji, and Tonga. Records of this species from the Kermadec Islands are based on Enneapterygius kermadecensis.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