The Chinese name is Japanese rock fan shrimp, also known as Japanese cicada shrimp, which belongs to the family Cicadanidae in the order Decapoda of the phylum Arthropods in the animal kingdom. It is a marine organism. The Japanese rock fan shrimp is a species in the Cicadaceae family, known as the Japanese cicada shrimp or Japanese rock fan shrimp. The maximum length of Japanese rock fan shrimp is 16 centimeters, and the length range of its shell is 4 to 7.4 centimeters. Females are larger than males. Its shell and upper abdomen are brown, with a blue hue on the leading edge, and its lower body and legs are yellow brown. The protrusion or protuberance on the back is purple on the side, while the protrusion in the middle of the back is cherry red; All the small bumps on the back are white.