Experts reveal how to survive a shark attack

They are big, have razor sharp teeth and they can swim very fast indeed, up to 60mph - so it's no wonder that they are the ocean's most feared predator.

But if a shark caught you in its sights what should you do? Should you try and swim off as fast as you can or stay and batter the animal around the face in the hope of scaring it away?
Is punching a shark in the nose to scare it off a myth?