1. Crayfish is omnivorous. In the wild natural environment, they basically feed on organic debris, epiphytic algae, filamentous algae, roots, leaves and fragments of aquatic plants, and especially like green plants with rich juice, such as water hyacinth, water hyacinth, POTAMOGETON malayi, Chlorophyta, VALLISNELLIA tenuiflora and so on. Animal foods include water worms, earthworms, eggs from aquatic insects, pupae, snails, mussels and fish.

2. Crayfish like to eat plankton. Although garbage such as heavy metals and oil stains are not the feeding objects of crayfish, they can adhere to food and enter crayfish. If you live in water polluted by heavy metal ions, the' poison' in crayfish is difficult to excrete.