A stocky-looking shark, the humpback smoothhound (Mustelus whitneyi) has a distinctively humped back, the shape of which gives this shark its name. The body is grey-brown above and much lighter below, and, unlike other members of the genus Mustelus, it has no spot or bar markings (2).
The humpback smoothhound’s mouth is angular and its teeth taper abruptly to a sharp point, making them ideal for crushing the shells and bones of its prey (2).
The fairly long head and snout of the humpback smoothhound make up roughly 25 percent of its total length. As with all members of the Mustelus genus, this species has two spineless dorsal fins, the second being almost as large as the first. The back edge of the second dorsal fin has a somewhat frayed appearance. There are few physical differences between the male and female humpback smoothhound, though the female tends to be slightly larger (2).
- Musola Prieta, Tollo Común.
- Adult length: 68 - 87 cm (2)
- Length at birth: c. 25 cm (2)