HomeFish encyclopediaHagfishesHagfishesHagfishesJespersen's hagfish Jespersen's hagfish (Myxine jespersenae) Scientific name: Myxine jespersenae M?ller, Feld, Poulsen, Thomsen & Thormar, 2005 The Jespersen's hagfish (Myxine jespersenae) is a marine fish of the family Myxinidae. In the aquarium it needs water at 4–5°C (39–41°F). Jespersen's hagfish care at a glanceTemperature4–5°C (39–41°F) BiologyDiagnosis: Color grayish brown with whitish head, the white extending posteriorly in a mid-ventral stripe of varying length; surrounding slime pores, PCD, gill aperture, cloaca, CFF, and VFF margins whitish. Two paired, pointed, or comb-shaped, bilaterally symmetrical nasal-sinus papillae with 2-5 distal fringes and 2 cusps in each row fused at their bases. Additional cusps in anterior rows 7-9 and posterior rows 8-10; total cusps 38-44. Pairs of gill pouches 6. Slime pores: prebranchial 28-37; trunk 65-74; tail 11-15; total 107-121. Body slender, depth over cloaca 2.9-4.3% TL; ventral finfold originates within anterior 10% of trunk; caudal finfold termination dorsally above cloaca to posterior 7% of trunk.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMyxine jespersenaeFamilyMyxinidae (Hagfishes)OrderMyxiniformes (Hagfishes)ClassMyxini (Hagfishes)Maximum length49.8Depth range752–1556 m (2467–5105 ft)EnvironmentMarine; benthopelagic; depth range 752 - 1556 mClimateDeep-waterDistributionNorth Atlantic: off West Greenland, in the eastern Davis Strait. Denmark Strait, Reykjanes Ridge, and South East of Iceland. Occurs sympatrically with Myxine glutinosa, although with a rather limited overlap in vertical distribution and no documented capture of both species in the same haul or trap exists.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026