HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesTasmanian robust triplefin Tasmanian robust triplefin (Forsterygion gymnotum) Scientific name: Forsterygion gymnotum Scott, 1977 The Tasmanian robust triplefin (Forsterygion gymnotum) is a brackish-water fish of the family Tripterygiidae. Native range: Southwest Pacific, southeastern Tasmania, Australia and New Zealand. Species factsScientific nameForsterygion gymnotumFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.7EnvironmentMarine; brackish; demersalClimateTemperateDistributionSouthwest Pacific: southeastern Tasmania, Australia and New Zealand.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