Description and Feeding
At birth they are less than 25 cm (10 in) and they mature at about 50 cm (20 in). Most records are of individuals less than 1 m (3.28 ft), but they can reach up to about 1.5 m (4.9 ft). Their litter size is from 7-8 pups off Angola to 23 in the Mediterranean. They have ridges over their eyes that expand into large rounded knobs, which are covered with enlarged denticles – these are absent in other species of rough shark. They possess very large spiracles that are vertically elongated, being almost as high as the length of their eye. Their first dorsal spine is orientated slightly forward. They feed on worms, crustaceans, and mollusks.
Range and habitat
They occur in the eastern Atlantic from Norway to South Africa, including the entire Mediterranean. They may also occur off Mozambique. They prefer coralline algal and muddy bottoms on continental shelves and upper slopes at depths of 50 to 660 m (165 to 2165 ft), but occur mostly below 100 m (328 ft).
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