Often called the ‘cow shark’, it grows to well over 8m. These sharks are characterised by a broad, pointed head, six pairs of gill slits, comb-like, yellow teeth and a long tail. Commonly studied deep-sea sharks, they are scavengers with a keen sense of smell. They have been found at depths down to 2,500ft (760m)
The large upper caudal fin can often be half the total length of these fish-eating sharks. It’s used to stun their prey before small, blade like teeth are used to devastating effect They can grow up to 900lb and have a short snout and large eyes placed forward on the head. Like dolphins, they are known to jump clear of the water, behaviour called ‘breaching’.
The blue shark is a pelagic (open water) fish with a distinctively coloured, streamlined body. It reaches nearly 4m, and its conical snout and long pectoral fins enable it to glide along in the ocean currents. It is found in the Atlantic, Pacific and Indian Oceans and feeds on other fish and sometimes seals. Blues in the UK are caught mainly off the Gulf Stream coasts of Wales, Cornwall and Ireland.