HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFlatheadsBlackfin flathead Blackfin flathead (Sorsogona nigripinna) Scientific name: Sorsogona nigripinna Regan, 1905 The Blackfin flathead (Sorsogona nigripinna) is a marine fish of the family Platycephalidae. Native range: Western Indian Ocean, Somalia and Gulf of Aden to Gulf of Oman. BiologyDorsal spines (total): 9; Dorsal soft rays (total): 12; Anal spines: 0; Anal soft rays: 12. Six bars on upper part of body; fins blackish except base and margin of anal fin which are pale.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSorsogona nigripinnaFamilyPlatycephalidae (Flatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range27–80 m (89–262 ft)EnvironmentMarine; demersal; depth range 27 - 80 mClimateTropicalDistributionWestern Indian Ocean: Somalia and Gulf of Aden to Gulf of Oman.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