Here are some facts about Sharks:

• Less than 10% of the world's sharks are actually dangerous to man. The most dangerous is the grey nurse shark.

• The great white shark, made famous in the film Jaws, can reach 11m (36ft) in length, and will eat anything – including man.

• Sharks have no bones, only a flexible skeleton made of cartilage. They also have very rough skin like sandpaper.

• Greenland sharks can live up to 400 years, and they reach sexual maturity at about the age of 150.

• The hammerhead shark's head has projections on each side, making it look like a hammer. Its eyes are on the end of these projections.

• The largest shark is the whale shark, which reaches 18m (60ft) in length and 13½ tons in weight. It feeds on plankton.

• Wobbegong sharks, also called 'carpet sharks', because of their broad, fringed heads and their carpet-like appearance. The pattern is actually a camouflage that enables the wobbegong to sneak up on its prey.

• The dwarf shark is surprisingly small, growing to only 30cm (1ft) in length. The common dogfish is also a species of small shark.