HomeFish encyclopediaRay-finned fishesPerch-like fishJawfishesLargesacle jawfish Largesacle jawfish (Opistognathus megalepis) Scientific name: Opistognathus megalepis Smith-Vaniz, 1972 The Largesacle jawfish (Opistognathus megalepis) is a marine fish of the family Opistognathidae. Native range: Western Central Atlantic, Mexico. Species factsScientific nameOpistognathus megalepisFamilyOpistognathidae (Jawfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Depth range146–285 m (479–935 ft)EnvironmentMarine; reef-associated; depth range 146 - 285 mClimateTropicalDistributionWestern Central Atlantic: Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026