Freshwater prawn (Macrobrachium rosenbergii), also known as the giant river prawn and giant tiger prawn, is a close relative to marine shrimp. They are one of over 950 species in the Palaemonidae ...
In the United States, we slap the "shrimp" label on everything that even bears a passing resemblance to that crustacean — even prawns. In Australia, they do the same thing with prawns — even shrimp.