The crab (Callinectes sapidus) is a decapod crustacean native to the western coast of the Atlantic Ocean. Its body is covered in a dark green exoskeleton.
In males, the legs (pleopods) have a gray-blue color, and this characteristic is what has given them the common name of blue crab or blue crab. However, in females, the tips of the legs are reddish-orange in color.