HomeFish encyclopediaRay-finned fishesPerch-like fishKnifejawsKnifejaw Knifejaw (Oplegnathus woodwardi) Scientific name: Oplegnathus woodwardi Waite, 1900 The Knifejaw (Oplegnathus woodwardi) is a marine fish of the family Oplegnathidae. Native range: Eastern Indian Ocean, southern Australia, from Western Australia to southern New South Wales and Tasmania. BiologyFound on the continental shelf and upper slope.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOplegnathus woodwardiFamilyOplegnathidae (Knifejaws)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length45.0Depth range50–400 m (164–1312 ft)EnvironmentMarine; demersal; depth range 50 - 400 mClimateTemperateDistributionEastern Indian Ocean: southern Australia, from Western Australia to southern New South Wales and Tasmania.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tmax assumed to be > 10) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026