Ornamental Crab, Tidal Pool, Haji Ali Royalty-Free Stock Image

Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting tail or abdomenusually hidden entirely under the thorax. They live in all the world`s oceans, in fresh water, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. Many other animals with similar names – such as hermit crabs, king crabs, porcelain crabs, horseshoe crabs, stone crabs, and crab lice – are not true crabs, but many have evolved features similar to true crabs through a process known as carcinisation.