Crayfish is omnivorous. In the wild natural environment, it basically eats organic debris, epiphytic algae, filamentous algae, roots, leaves and fragments of aquatic plants, and especially likes green plants with rich juice, such as water hyacinth, water hyacinth, POTAMOGETON malayi, green duckweed and bitter grass. Animal food includes water earthworm, earthworm, eggs from aquatic insects, pupae, snails, mussels and fish.

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, it is difficult to excrete the' poison' in crayfish.

Extended data

Because the omnivorous crayfish has a very strong viability, it has occupied territory in Europe and Africa in addition to Japan and China, so it has become a world-class biological invasive species and a world-class delicacy.

In Europe, Africa, Australia, Canada, New Zealand and the United States, people eat crayfish. Louisiana in the United States claims to produce 90% of the world's crayfish, and local people eat 70% of them.