The big eyed crab is an animal of the genus big eyed crab in the family Crabaidae. It is distributed in the west coast of Korea, Singapore, Australia, Taiwan Island, as well as Hainan Island, Fujian, Zhejiang, Shandong, Bohai Bay, Liaodong Bay, Liaodong Peninsula and other places in Chinese Mainland. The living environment is seawater, and it is often found in the intertidal zone near the coast or on muddy beaches at river mouths. The living environment is seawater, and it is often found in the intertidal zone near the coast or on muddy beaches at river mouths. The width of the head and chest armor is about 1.5 times its length, with surface particles and soft fur, especially dense in males.