HomeFish encyclopediaRay-finned fishesPerch-like fishJawfishesTail beacon jawfish Tail beacon jawfish (Opistognathus dipharus) Scientific name: Opistognathus dipharus Smith-Vaniz, 2010 The Tail beacon jawfish (Opistognathus dipharus) is a marine fish of the family Opistognathidae. Native range: Western Indian Ocean, known only from the southern Red Sea. BiologyDorsal spines (total): 11; Dorsal soft rays (total): 15; Anal spines: 3; Anal soft rays: 16; Vertebrae: 29. This species is distinguished by the following set of characters: maxilla rigid with no flexible lamina posteriorly; D XI,15; A III,16; base of caudal fin with pair of conspicuous pale oval spots.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOpistognathus dipharusFamilyOpistognathidae (Jawfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length4.7EnvironmentMarine; pelagic-neriticClimateTropicalDistributionWestern Indian Ocean: known only from the southern Red Sea.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