Crab claws contain a flesh highly appreciated by gourmets, which explains their separate sale. These claws, called chelipeds, correspond to the first two pairs of pereiopods (thoracic legs used for grasping) of decapod crustaceans. Their size varies frequently according to the gender (male/female) but also between the left and the right in the same specimen. Much less developed and lacking claws, the crab's other four pairs of legs are inedible and are used for locomotion.