What is "poroderma"

Poroderma is a genus of catshark, and part of the family Scyliorhinidae. The color of these sharks are usually grey with dark stripes. They are found in South Africa and are nocturnal. They live preferably in shore areas, close to the bottom, to depths of 100 m. They prefer small caves and crevices. Their diet usually consists of crustaceans, but they also feed on small fish. Their average size is between 60 and 80 cm, with a maximum total length of about 100 cm. Their birth size is about 15 cm. They are harmless to humans.