The Common Prawn (Palaemon serratus) is a marine (saltwater) crustacean in the Palaemonidae family of invertebrate ten-footed shrimp (decapod). It is related to the crab and the lobster.

The Common Prawn is transparent (see-through) to pinkish-brown with reddish striped-liked markings and patterns. It has an exo-skeleton (outside skeleton) called a carapace or shell. Its forward extension of the carapace in front of its eyes, called the rostrum, curves upwards. The rostrum is also bifurcated at the tip, which means that it is split into two parts. It has long, white antennae. It has bulging eyes. It has ten legs.