HomeFish encyclopediaSharks and RaysGround sharksCat sharksFiletail catshark Filetail catshark (Parmaturus xaniurus) Scientific name: Parmaturus xaniurus Gilbert, 1892 The Filetail catshark (Parmaturus xaniurus) is a marine fish of the family Scyliorhinidae. Native range: Eastern Central Pacific, central California, USA to the Gulf of California. BiologyFound on the outer continental shelf and upper slope. Feeds on a variety of small fish (e.g. lanternfish) and invertebrates. Oviparous. Possesses an enlarged gill region which is an adaptation to areas with low dissolved oxygen levels. Has a high concentration of squalene in its liver which affords it neutral buoyancy. Regularly caught by bottom trawlers but not utilized at all.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParmaturus xaniurusFamilyScyliorhinidae (Cat sharks)OrderCarcharhiniformes (Ground sharks)ClassElasmobranchii (Sharks and Rays)Maximum length45.0Depth range91–1251 m (299–4104 ft)EnvironmentMarine; demersal; depth range 91 - 1251 mClimateSubtropicalDistributionEastern Central Pacific: central California, USA to the Gulf of California.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceLow, 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