HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesNotched triplefin Notched triplefin (Trinorfolkia incisa) Scientific name: Trinorfolkia incisa Kuiter, 1986 The Notched triplefin (Trinorfolkia incisa) is a marine fish of the family Tripterygiidae. Native range: Eastern Indian Ocean, Present in southwestern Australia. Species factsScientific nameTrinorfolkia incisaFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.6Depth range3–25 m (10–82 ft)EnvironmentMarine; demersal; depth range 3 - 25 mClimateSubtropicalDistributionEastern Indian Ocean: Present in southwestern Australia.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