Crabs

Crabs are a type of crustacean, characterized by having a thick exoskeleton, one pair of claws (chelipeds), and five pairs of legs, the last two may be modified to a paddle-like shape for swimming. They range in size from very small (a few millimeters) to very large (4 m/17 ft). Many are edible!

Some crabs can swim! Organisms that live in the water are refered to as pelagic organisms. Below are some photos of pelagic crabs.