Hermit crabs, mainly produced in the Yellow Sea and South China Sea, generally live in the crevices of rocks on beaches and seashores. Hermit crabs use snail shells as carriers, usually crawl with negative shells, and when they are frightened, they will immediately shrink into the snail shells. As crabs grow up, hermit crabs will look for new shells to replace them. There are dozens of known species of hermit crabs, and the common species in China coastal areas are Hermit Crab with Square Wrist and Chlamys farreri. Hermit crab with square wrist is slightly larger than that with comb claw, and the maximum diameter of snail can reach more than 15 cm.

Hermit crabs can be kept in fish tanks, larger glass jars, plastic jars and other containers, and the bottom is covered with sand and gravel to build a slope. Adjust the gradient to 1/3- 1/4 with 0.4-0.5% saline water, and install a small filter if possible. Hermit crabs can be fed with minced fish, mussel meat or shrimp meat. Food should be placed on the sand surface of water and fed once a day. Food that cannot be eaten should be cleaned up in time to avoid polluting the water quality. Change the water weekly in summer 1/3, and the water change time in winter can be slightly longer.