Slender smooth-hound Zealand, including submarine features to the north such as the Three Kings Ridge, the Challenger Plateau, and the Wanganella Bank. This uncommon species is mainly found between deep, but has been recorded from deep. It prefers a temperature of around and a salinity of approximately 34.8‰. Generally swimming near the sea floor, this shark inhabits both soft and rocky-bottomed habitats in terrain ranging from plateaus to steep slopes. The slender smooth-hound has a very thin body and a broad, highly flattened head. The snout is long, with a distinctive bell-shaped outline when viewed from above. The eyes have an elongate
Humpback smooth-hound 45°S. Its depth range is between but it is most common between . It is found near the seabed, often on rocky shores, where it feeds on small fish and crustaceans such as crabs and mantis shrimps. It is viviparous and the females bear litters of five to ten young which are about long when born. The humpback smooth-hound is fished for human consumption in Chile but more particularly in Peru, where it is more common. Along with the spotted houndshark ("Triakis maculata") and the speckled smooth-hound ("Mustelus mento") it is known as "tollo" in its local fisheries, and of