Humpback smooth-hound Humpback smooth-hound The humpback smooth-hound ("Mustelus whitneyi") is a houndshark of the family Triakidae. It is found on the continental shelves of the tropical southeast Pacific, from Peru to southern Chile, between latitudes 3° S and 54° S, at depths between . Its conservation status is considered to be "vulnerable" by the IUCN. The humpback smooth-hound is a small shark growing to a length of up to . It has a sturdy body with a moderately long, broad, sharply angled snout and large eyes, set widely apart. The mouth is fairly long and the upper lip furrows are longer than
Dusky smooth-hound replaced tooth. Teeth are replaced at a rate of one row per 10 to 12 days. "M. canis" feeds mostly on crustaceans, polychaetes, and mollusks. Smooth dogfish also eat squid, worms, small fish, razor clams, and occasionally garbage. They are nocturnal scavengers and opportunistic predators. Their nocturnal activity helps them to take advantage of concentrations of crustacean prey. The mating season of smooth dogfish is from May to June. They are viviparous and have a yolk-sac placenta. Females can store sperm up to a year, but how long it can be used is not known. Their gestation period is 10