Visitors to a popular British holiday island were alarmed to find a beach had become a 'graveyard' for crabs. The coastal spot was covered with thousands of the crustaceans, creating an astonishing spectacle.
However, rather then being live specimens, the crabs were in fact empty shells - left behind as part of a natural moulting process. The carcasses were the shells of spider crabs, which have distinctive spiny shells and long, spindly legs.
Each summer they they migrate from deep to shallower coastal waters to moult their shells. This is part of their life cycle that enables them to grow, North Wales Live reports.
