The bigger the better. Rice crab is a river crab, also known as "crab" or "hairy crab", a crustacean of arthropod. River crabs are rampant. The head and chest armor combined with the head and chest is square and hard. The public commented that the crab meat in big rice fields is thick, full of paste, full of seeds and yellow, and the bigger the meat, the more delicious it is. Rice crabs usually dig holes in mud dikes of rivers, lakes and swamps, move at night and feed on fish, shrimp, animal carcasses and grains.