HomeFish encyclopediaSharks and RaysGround sharksCat sharksMud catshark Mud catshark (Bythaelurus lutarius) Scientific name: Bythaelurus lutarius Springer & D'Aubrey, 1972 The Mud catshark (Bythaelurus lutarius) is a marine fish of the family Scyliorhinidae. Native range: Western Indian Ocean, off Mozambique and Somalia. BiologyFound on the continental slope on or just above muddy substrates. Feeds on cephalopods, small bony fishes, and crustaceans. Probably caught with bottom trawls.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBythaelurus lutariusFamilyScyliorhinidae (Cat sharks)OrderCarcharhiniformes (Ground sharks)ClassElasmobranchii (Sharks and Rays)Maximum length34.0Depth range338–766 m (1109–2513 ft)EnvironmentMarine; bathydemersal; depth range 338 - 766 mClimateDeep-waterDistributionWestern Indian Ocean: off Mozambique and Somalia.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceVery Low, minimum population doubling time more than 14 years (Fec=2) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026