HomeFish encyclopediaRay-finned fishesPerch-like fishJawfishesSpotfin jawfish Spotfin jawfish (Opistognathus robinsi) Scientific name: Opistognathus robinsi Smith-Vaniz, 1997 The Spotfin jawfish (Opistognathus robinsi) is a marine fish of the family Opistognathidae. Native range: Western Central Atlantic, USA and the Bahamas. BiologyDorsal spines (total): 10 - 11; Dorsal soft rays (total): 15-18; Anal spines: 2 - 3; Anal soft rays: 16 - 18; Vertebrae: 29 - 31. Anterior nostril a short tube with simple cirrus on posterior rim; posterior end of maxilla of adult males produced as a thin flexible lamina that usually extends beyond posterior margin of opercle; spinous dorsal fin with black spot encircled by broad white ring; adult males with inner lining of maxilla and adjacent membranes with prominent black stripe (stripe usually absent or light brown and poorly developed in females; buccal pigmentation consisting of a large dark area widely surrounding esophageal opening, including medial area between upper pharyngeal tooth patches; caudal vertebrae typically 20.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOpistognathus robinsiFamilyOpistognathidae (Jawfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length13.1Depth range46 m (151 ft)EnvironmentMarine; demersal; depth range ? - 46 m, usually ? - 20 mClimateTropicalDistributionWestern Central Atlantic: USA and the Bahamas.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