HomeFish encyclopediaRay-finned fishesSmeltsSlickheadsLongtail slickhead Longtail slickhead (Talismania longifilis) Scientific name: Talismania longifilis Brauer, 1902 The Longtail slickhead (Talismania longifilis) is a marine fish of the family Alepocephalidae. Native range: Eastern Atlantic, Western Sahara south to Angola. Indo-West Pacific: Mozambique Ridge, Great Australian Bight and Shoalhaven Bight, N.S.W. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 20-25; Anal spines: 0; Anal soft rays: 19 - 25Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTalismania longifilisFamilyAlepocephalidae (Slickheads)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length46.3Depth range750–1550 m (2461–5085 ft)EnvironmentMarine; bathypelagic; depth range 750 - 1550 mClimateDeep-waterDistributionEastern Atlantic: Western Sahara south to Angola. Indo-West Pacific: Mozambique Ridge, Great Australian Bight and Shoalhaven Bight, N.S.W.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceLow, 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