Similar to prawn, Pippi shrimp has joints and appendages, and its body surface color is blue-gray, while lobster is rich in color and large in size.

The official name of Pippi shrimp in Chinese mainland is "Squid Shrimp", which belongs to Arthropoda, Crustacea, Soft Crustacea, Shrimp-eating Subclass and Gastropoda. There is a movable trapezoidal frontal plate in the center of the front edge of the breastplate on the head of Pipi shrimp. There are movable eye nodes and antenna nodes in front, and the abdomen is wide with six nodes. Finally, there is a wide and short caudal segment, with a ridge in the center of the back and a strong thorn at the rear edge.

Penaeus belongs to Arthropoda, Crustacea, Decapoda, Penaeidae and Penaeus. Its body can be divided into head, chest and abdomen. * * * consists of 2 1 segment, and each segment has a pair of appendages except the first and last segment.