If you can buy fresh, the shrimp should have its ... prawns are not just big shrimp; the crustaceans live in freshwater, while shrimp can live in either, with a slightly different body structure.

Generally, prawns are larger, a tad more expensive, and found only in fresh water. A common question many shrimp-shoppers have is whether to buy them with the shell on or off. They can be packaged ...