HomeFish encyclopediaSharks and RaysFrill and cow sharksCow sharksBigeyed sixgill shark Bigeyed sixgill shark (Hexanchus nakamurai) Scientific name: Hexanchus nakamurai Teng, 1962 The Bigeyed sixgill shark (Hexanchus nakamurai) is a marine fish of the family Hexanchidae. BiologyFound on continental and insular shelves and upper slopes, from 90 to 600 m depth, usually on or near bottom, may move to the surface at night. Probably feeds on bony fish and crustaceans. Ovoviviparous, with 13 young in a litter. Not dangerous to people as far as is known. Utilised for its fins, meat and liver oil but of little value due to its relatively small size.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHexanchus nakamuraiFamilyHexanchidae (Cow sharks)OrderHexanchiformes (Frill and cow sharks)ClassElasmobranchii (Sharks and Rays)Maximum length180Common length120Depth range0–600 m (0–1969 ft)EnvironmentMarine; bathydemersal; depth range 0 - 600 m, usually 90 - 600 mClimateDeep-waterDistributionWestern Central Atlantic: Mexico, off Bahamas, northern Cuba, Nicaragua and Costa Rica. Eastern Atlantic: France to Morocco, including Mediterranean Sea; possibly C?te d'Ivoire and Nigeria. Indian Ocean: off eastern and southern Africa, Aldabra Island (India); Western Australia. Western Pacific: Japan, Taiwan, Philippines, New Caledonia and eastern Australia.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: subsistence fisheriesResilienceVery Low, minimum population doubling time more than 14 years (Fec = 13) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026