Thousands of spider crabs have converged on the beaches of Cornwall due to rising sea temperatures caused by the climate crisis. The migratory creatures swarmed in the shallow water in St Ives, shedding their shells before returning to depths of up to 90 metres (300ft).
The crustaceans are instantly recognisable for their long legs and pincers, but they are harmless to humans. However, their presence at Porthgwidden beach was enough to put many bathers off entering the sea.
