HomeFish encyclopediaRay-finned fishesGrinnersDeep-sea tripod fishesBlackfin spiderfish Blackfin spiderfish (Bathypterois phenax) Scientific name: Bathypterois phenax Parr, 1928 The Blackfin spiderfish (Bathypterois phenax) is a marine fish of the family Ipnopidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 13-15; Anal spines: 0; Anal soft rays: 8 - 10. Black in color.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBathypterois phenaxFamilyIpnopidae (Deep-sea tripod fishes)OrderAulopiformes (Grinners)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length16.0Depth range800–2657 m (2625–8717 ft)EnvironmentMarine; bathydemersal; depth range 800 - 2657 m, usually 1200 - 2000 mClimateDeep-waterDistributionEastern Atlantic: Off Sierra Leone and Liberia and off South Africa (as Bathypterois ater). Western Atlantic: at bathyal depths between latitude 40?N-5?N including Gulf of Mexico and Caribbean Sea, and off southern Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (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