Spotless smooth-hound consumption of its flesh and fins which are much esteemed. It is caught using gillnets, trawls and longline fishing, either as bycatch or as a targeted species. It is not known whether the level of fishing is sustainable or whether the population is in decline. The IUCN has listed its conservation status of this shark as being "data deficient" and considers that further survey work needs to be done to assess population trends and catch sizes. Spotless smooth-hound The spotless smooth-hound ("Mustelus griseus") is a species of houndshark, in the family Triakidae, found on the continental shelves of the northwest
Humpback smooth-hound the three species it is the humpback smooth-hound that is the main target of the tollo fishery in Peru. Landings averaging 11,000 tons of tollo per year were made in that country between 1965 and 1989, but quantities caught diminished thereafter. A minimum size requirement of was set in 2001 but was pitched so low as to have limited conservation effect. The International Union for Conservation of Nature (IUCN) has rated the status of the humpback smooth-hound as being "vulnerable" and considers more should be done to publicise and enforce the size limit. Humpback smooth-hound The humpback smooth-hound ("Mustelus whitneyi")