HomeFish encyclopediaRay-finned fishesPerch-like fishCutlassfishesSlender frostfish Slender frostfish (Benthodesmus tenuis) Scientific name: Benthodesmus tenuis G?nther, 1877 The Slender frostfish (Benthodesmus tenuis) is a marine fish of the family Trichiuridae. BiologyDorsal spines (total): 38 - 42; Dorsal soft rays (total): 78-89; Anal spines: 2; Anal soft rays: 69 - 76; Vertebrae: 122 - 132. Body silvery, jaws and opercle blackish. The inside of the mouth and gill cavities black.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBenthodesmus tenuisFamilyTrichiuridae (Cutlassfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length230Common length50.0Depth range200–850 m (656–2789 ft)EnvironmentMarine; benthopelagic; depth range 200 - 850 mClimateDeep-waterDistributionWestern Atlantic: Canada, off Cape Hatteras, Gulf of Mexico, Suriname and southern Brazil. Eastern Atlantic: Gulf of Guinea to Angola. Western Indian Ocean: off Natal, South Africa. Western Pacific: Emperor Seamounts, Japan, Ryukyu Islands, Viet Nam, and the Sulu Sea. Indian Ocean: south of Java, Indonesia. Reported from British Columbia, Canada.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming tmax>10) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026