Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Astacidea
Superfamily: Astacoidea & Parastacoidea
Freshwater crustaceans that breathe through feather like gills, they are scavengers that live in the bottom of lakes, brooks, and streams. The body is made up of twenty segments making up the cephalothorax and the abdomen. The crayfish is usually 17.5 cm. the oldest fossil record of the crayfish dates back to the late Mesozoic .
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