A small shark, Spurdog can be usually found in deep water in Wales so are usually caught on boats, although they will move into relatively shallow water to feed, so they can come within range of the shore fisherman.
Spurdog will spend most of their time hunting on or near the seabed for bottom dwelling fish. They travel in large shoals. The can run to over 20lb in weight.
This fish has mildly venomous spines, which can inflict woulds if not careful when handling them.