HomeFish encyclopediaSharks and RaysBramble, Sleeper and Dogfish sharksDogfish sharksRoughskin spurdog Roughskin spurdog (Cirrhigaleus asper) Scientific name: Cirrhigaleus asper Merrett, 1973 The Roughskin spurdog (Cirrhigaleus asper) is a marine fish of the family Squalidae. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. A heavy-bodied dogfish with a blunt, rounded snout, large denticles and noticeably rough skin; body without spots; 1st dorsal fin spine behind pectoral fins. Dark grey or brown above, lighter below; white edges on fins; juveniles brown.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCirrhigaleus asperFamilySqualidae (Dogfish sharks)OrderSqualiformes (Bramble, Sleeper and Dogfish sharks)ClassElasmobranchii (Sharks and Rays)Maximum length120Depth range200–650 m (656–2133 ft)EnvironmentMarine; bathydemersal; depth range 200 - 650 mClimateDeep-waterDistributionWestern Atlantic: North Carolina to the Florida Keys and the northern Gulf of Mexico. Western Indian Ocean: southern Mozambique to South Africa; also Reunion, Comoros, and the Aldabra islands. Eastern Central Pacific: Hawaiian Islands.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceLow, minimum population doubling time 4.5 - 14 years (Fec=21-22) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026