River crabs are omnivorous crustaceans. Animal foods include fish, shrimps, snails, clams, earthworms and aquatic insects; plant foods include duckweed, filamentous algae, Vallisneria, hornwort, Echinacea, Echinacea, Hydrilla verticillata, Eichhornia crassipes (water hyacinth), Eclipta (water peanut) and pumpkin, etc.; concentrated feed includes bean cake, vegetable cake, wheat, rice and corn, etc. However, under normal circumstances, food such as aquatic plants is easier to obtain, so in the natural environment, the food composition in the stomach is often dominated by plant food.