- Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting “tail” (abdomen), usually hidden entirely under the thorax (brachyura means “short tail” in Greek). They live in all the world’s oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. They first appeared during the Jurassic Period.
When ye be come into the land of Canaan, which I give to you for a possession, and I put the plague of leprosy in a house of the land of your possession;
Leviticus 14:34 KJV