HomeFish encyclopediaRay-finned fishesPerch-like fishKnifejawsSpotted knifejaw Spotted knifejaw (Oplegnathus punctatus) Scientific name: Oplegnathus punctatus Temminck & Schlegel, 1844 The Spotted knifejaw (Oplegnathus punctatus) is a marine fish of the family Oplegnathidae. Native range: Pacific Ocean, Central Honshu, Japan to the South China Sea. Also known from Hawaii. BiologyInhabit rocky and coral reefs. Juveniles associate with drifting seaweed. Benthopelagic.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOplegnathus punctatusFamilyOplegnathidae (Knifejaws)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length86.0Depth range3–135 m (10–443 ft)EnvironmentMarine; reef-associated; oceanodromous; depth range 3 - 135 mClimateTropicalDistributionPacific Ocean: Central Honshu, Japan to the South China Sea. Also known from Hawaii.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercial; aquaculture: commercial; gamefish: yes SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026