In effect they are miniature sharks and can be found around all of Lundy coastline. Sharks have a skeleton made of cartilage (same bendy material as your ears), rather than bone, and tiny backwards pointing projections, which are modified teeth, all over their skin, rather than scales. Dogfish spend a lot of their time sitting on the seabed in and around kelp forests. Here they hunt crabs, prawns and small fish. They are very slow growing fish, giving birth to small numbers of young. This makes them vulnerable to over-fishing