Swimming Crab (Liocarcinus depurator), legs spread out, viewed from above showing swimmerettes on hind legs, sandy seabed, St Abbs, Scotland, UK North Sea

underwater one animal swimming crab crab crabs swim swimming liocarcinus depurator legs swimmeret's claws claw leg hind legs sandy sea bottom seabed st abbs scotland uk united kingdom shell crustacean crusteans pinchers pincher north sea sealife sea life