The foods eaten by small crabs are phytoplankton, zooplankton, aquatic plants, benthos and terrestrial plants.

1, phytoplankton: including diatoms, Chrysophytes, dinoflagellates, gymnosperms, green algae, etc., which are feeds for early young crabs and zooplankton.

2. Zooplankton: rotifers, cladocera, cladocera, etc. are its good feed.

3. Aquatic plants: including Sophora alopecuroides, hydrilla verticillata, POTAMOGETON crispus, POTAMOGETON malayi, Polygonum aviculare, duckweed, water hyacinth, Alternanthera philoxeroides, etc., are its main natural bait.

4. Benthic animals: snails, clams, mussels and water worms in the waters are its best feed.

5. Terrestrial vivid plants: including Tenebrio molitor, earthworm, ryegrass, Pennisetum, polymer grass, etc.