Mae'r forgath frech yn un o'r rhywogaethau lleiaf o forgathod, sy'n tyfu i ddim ond 80cm.

Despite its name, the "common" skate is not so common anymore. In fact, they are Critically Endangered.

It's easy to see where the blue shark got its name from. These sleek, elegant sharks have beautiful metallic blue backs which provide brilliant camouflage out in the open ocean.

The porbeagle shark is a member of the shark family Lamnidae, making it one of the closest living relatives of the great white shark.

The thresher shark is a migratory species and passes through UK waters in the summer months. If you’re lucky, you might see this magnificent shark jump high out of the water in to the air.