HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesDeepwater triplefin Deepwater triplefin (Matanui profundum) Scientific name: Matanui profundum Fricke & Roberts, 1994 The Deepwater triplefin (Matanui profundum) is a marine fish of the family Tripterygiidae. Native range: Southwest Pacific, New Zealand. BiologyFound on the lower shelf and upper slopes all around mainland New Zealand. Minimum depth from.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMatanui profundumFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length9.4Depth range97–500 m (318–1640 ft)EnvironmentMarine; benthopelagic; depth range 97 - 500 mClimateTemperateDistributionSouthwest Pacific: 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