River crabs, also known as "crabs" or "hairy crabs", river crabs have a very mixed diet, in natural conditions to eat water plants, humus-based, animal carcasses, but also like to eat snails, mussels, worms, insects, and occasionally prey on small fish, shrimp, and when food is scarce, it will also be When food is scarce, they will also kill each other and even swallow their own eggs, and sometimes a dead fish will cause the same kind of competition for food, in general, the river crab to get plant food easily, often constitute the main ingredients of crab stomach food, and there are some sediment in the stomach, which is a sign of the river crab feeding on the benthic organisms and humus.

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