HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsBlackblotch swallowtail Blackblotch swallowtail (Odontanthias caudicinctus) Scientific name: Odontanthias caudicinctus Heemstra & Randall, 1986 The Blackblotch swallowtail (Odontanthias caudicinctus) is a marine fish of the family Serranidae. Native range: Southeast Atlantic and Western Indian Ocean, off Transkei, South Africa and off Kenya. BiologyDorsal spines (total): 10; Dorsal soft rays (total): 14; Anal spines: 3; Anal soft rays: 7 - 8Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOdontanthias caudicinctusFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Depth range100–300 m (328–984 ft)EnvironmentMarine; pelagic-oceanic; depth range 100 - 300 mClimateDeep-waterDistributionSoutheast Atlantic and Western Indian Ocean: off Transkei, South Africa and off Kenya.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026