An exotic crab has been found in British waters for the first time after travelling 4,000 miles across the Atlantic on a piece of polystyrene.

The short-spined hairy crab was found on Chesil Beach, near Weymouth, Dorset by naturalist Steve Trewhella.

The animal is usually found in warm waters such as the Caribbean and the Gulf of Mexico but was washed up in the UK on a polystyrene shellfish buoy from Florida Keys.