Crayfish are freshwater crustaceans resembling small lobsters. In some parts of the United States they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, mudbugs, or yabbies. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea.
Class: Malacostraca
Kingdom: Animalia
Order: Decapoda
Length: 18 cm
Subphylum: Crustacea
Phylum: Arthropod