Mustelus fasciatus

Mustelus fasciatus, commonly known as the striped smooth-hound or striped dogfish, is a small shark species belonging to the family Triakidae. This demersal shark is characterized by distinctive dark stripes or bands across its body, which distinguish it from other smooth-hound species. The species inhabits coastal waters of the southwestern Atlantic Ocean, primarily along the continental shelf of Brazil, Uruguay, and northern Argentina.

Mustelus fasciatus typically occurs in shallow to moderate depths over sandy and muddy bottoms, where it feeds on small bony fish, crustaceans, and cephalopods. The species exhibits ovoviviparous reproduction, with females giving birth to live young after internal egg development. Currently classified as Critically Endangered by the IUCN, Mustelus fasciatus faces severe population declines throughout its range.

The primary threats include intensive fishing pressure from both targeted and incidental capture in commercial fisheries, particularly bottom trawling operations. Habitat degradation in coastal areas and the species' limited geographic range further compound conservation challenges. The shark's slow reproductive rate and late maturity make population recovery particularly difficult once numbers decline.

Conservation efforts remain limited, with the species receiving minimal specific protection measures. Improved fisheries management, including catch limits and gear modifications to reduce bycatch, represents the most viable conservation approach. Enhanced monitoring of population trends and habitat protection in critical areas are essential for preventing further decline of this endemic South American shark species.

This species inhabits coastal waters of the southwestern Atlantic Ocean along the continental shelf, primarily off Brazil, Uruguay, and northern Argentina. It typically occurs over sandy and muddy bottoms in shallow to moderate depths.