The scientific name of crayfish is Pro-cambarusClarkii(Cirard), also known as Crayfish Crayfish, which can also be called Red Crayfish or Freshwater Crayfish. It seems that only Shanghainese call it Crayfish (nothing to do with Crayfish). It belongs to Arthropoda, Crustacea, Decapoda, Reptilia, crayfish superfamily, Acaridae and Procambarus. Because the crayfish suborder is divided into Cambaridae, Astacidae, Parastacidae and Homaridae, that is, all shrimps belong to this superfamily. So from the classification, crayfish is obviously a kind of shrimp.