Shrimp are arthropods. The fish, on the other hand, belong to the osteoarthritis of the Cordata period. The body of the fish is covered with cycloid , ganoid or tinoid type scales , which are absent in shrimp. The fish has four pairs of scales on either side of its head , which are covered with concoction. There are no such gills on the body of shrimp. That is, shrimp is not a fish because of its different characteristics from fish.