HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesChatham deep-water triplefin Chatham deep-water triplefin (Matanui bathytaton) Scientific name: Matanui bathytaton Hardy, 1989 The Chatham deep-water triplefin (Matanui bathytaton) is a marine fish of the family Tripterygiidae. Native range: Southwest Pacific, Widely distributed in New Zealand. BiologyJuveniles are found in shallow waters (12-80 m) then migrate into deeper waters as they mature.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMatanui bathytatonFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length9.4Depth range80–550 m (262–1804 ft)EnvironmentMarine; demersal; depth range 80 - 550 mClimateSubtropicalDistributionSouthwest Pacific: Widely distributed in 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