The sharptooth smooth-hound (Mustelus dorsalis) is a houndshark of the family Triakidae. It is found on the continental shelves of the tropical eastern Pacific from southern Mexico to Peru between latitudes 20ðN and 5ðS. Its length is up to .
The sharptooth smooth-hound dwells on the bottom, feeding on crustaceans, particularly shrimp. Reproduction is viviparous, with four pups per litter, and length at birth about .