River crabs are omnivorous crustaceans. Animal food includes fish, shrimp, snails, mussels, earthworms and aquatic insects, etc.; plant food includes duckweed, filamentous algae, bitter grass, goldfish algae, minced grass, Malayan eyelet, black algae in whorls, water hyacinth (water hyacinth), water-loving lotus grass (water peanut) and pumpkin, etc.; and concentrate feed includes soybean cake, vegetable cake, wheat, paddy, and corn. However, in general, food such as water plants is easier to obtain, so in the natural environment, the composition of food in its stomach is often dominated by plant food.