HomeFish encyclopediaHagfishesHagfishesHagfishesLongfinned hagfish Longfinned hagfish (Eptatretus longipinnis) Scientific name: Eptatretus longipinnis Strahan, 1975 The Longfinned hagfish (Eptatretus longipinnis) is a marine fish of the family Myxinidae. Native range: Eastern Indian Ocean, Off Robe and off Cape Douglas, South Australia. BiologyThis species is distinguished from all its congeners by its ventral fin fold beginning anterior to the first pair of gill apertures.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEptatretus longipinnisFamilyMyxinidae (Hagfishes)OrderMyxiniformes (Hagfishes)ClassMyxini (Hagfishes)Maximum length62.7Depth range14–40 m (46–131 ft)EnvironmentMarine; demersal; non-migratory; depth range 14 - 40 mClimateTemperateDistributionEastern Indian Ocean: Off Robe and off Cape Douglas, South Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Fec assumed to be SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026