Shrimp, also known as prawns, are long-fanged, decapod crustaceans with horn-like, flexible body coverings, laterally compressed bodies, large scales projecting above the stalks of the outer antennae, and antennae turned in a line. Shrimp come in many different species that are distributed throughout the world. However, it is not a natural group of organisms, but an aggregation of several groups of animals.