The red crayfish is an omnivore. Under natural conditions, the main aid food organic debris, algae, filamentous algae, aquatic plant roots, leaves and debris. Especially like to eat juicy, fat and tender green plants, such as water lily, water hyacinth, Malayan eye, green peppercorns, spaghetti grass. Animal food like to eat water silk worms, earthworms, aquatic insects, eggs, nymphs, snails, mussels, fish and so on. Red crayfish in rivers, reservoirs, ponds can live, lurking in the water column during the day can be hidden places; evening and pre-dawn out of the foraging, like the night activities, camp benthic crawling method. Often in the brick, tile, gravel gap crawling or lurking in the natural caves and artificial caves in the pond, in the softer bottom of the pond has the ability to dig. Sometimes also crawl along the wall or climb in the roots and dense leaves of aquatic plants.