 They also have a disproportionately large dark purple pincher and long black eye stalks which they can easily be identified by.There is also a pink variation of "C. brevimanus" in which their dominant pincher is pink instead of a dark purple.Compared to other species in their genus, they do not prefer large gastropod shells, and the armored variation of this crab, in which a tougher exoskeleton is present, specifically likes small shells that only cover their body past their third pair of walking legs.