HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesThomas' triplefin Thomas' triplefin (Norfolkia thomasi) Scientific name: Norfolkia thomasi Whitley, 1964 The Thomas' triplefin (Norfolkia thomasi) is a marine fish of the family Tripterygiidae. Native range: Western Pacific, Western Australia in the eastern Indian Ocean to New Caledonia, Rapa, the Tuamoto Archipelago and Mangar?va. BiologyFound in coral reefs and intertidal pools.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNorfolkia thomasiFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length4.0Depth range1–20 m (3–66 ft)EnvironmentMarine; reef-associated; depth range 1 - 20 mClimateTropicalDistributionWestern Pacific: Western Australia in the eastern Indian Ocean to New Caledonia, Rapa, the Tuamoto Archipelago and Mangar?va.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