Genus Mustelus, commonly known as the smooth-hounds, is a group of sharks found in coastal waters worldwide. There are several synonyms used to refer to this group of sharks including the common name dogfish and the scientific name Triakis scyllium. Other synonyms include the names smooth dogfish, grey dogfish, and spotted dogfish. These names are often used interchangeably with the genus Mustelus, however, it is essential to note that they may also refer to other species of sharks. The smooth-hounds are valuable for their meat, skin, and oil, and are also used in research to understand the biology and behavior of sharks.