Crabs are cultured artificially. Crab seedlings are introduced in April every year, and the crabs are cultured in 1 February of that year. They are cultured in large ponds in the second year, and they can be listed as soon as ten days before the Mid-Autumn Festival, so the whole breeding cycle of crabs is less than1year and a half.

Precautions for crab culture:

1, pond conditions: sufficient water source, convenient water intake and drainage, good water pollution, clay, sandy soil or sub-sandy soil with good ventilation, which is beneficial to the growth and reproduction of aquatic plants, benthic insects, snails, water worms, etc. The old pond should be completely dredged, and the silt should not exceed 20cm, and the pond area should not be too small. The water depth of the pond is kept at about 0.6-1.5 meters all the year round, and the water depth varies from place to place. At the shallowest point, 10cm, several mounds slightly above the water surface can be built in the pond, that is, crab island, where aquatic plants can be transplanted. The pond should not be too steep, and the slope ratio is generally 1: 1.5. Artificial caves can also be built.

2. Transplanting aquatic plants: The natural yield of crabs mainly depends on the number of aquatic plants and benthic organisms (food organisms) in the waters. It is an indispensable technical measure to plant aquatic plants well in the process of breeding. Planting aquatic plants can not only feed crabs and supplement vitamins for ten days, but also support mutual fighting and concealment, which is a powerful measure to improve the survival rate of crabs in each period. In addition, it can absorb harmful ammonia nitrogen, carbon dioxide and organic substances in the pool, release oxygen and stabilize water quality. The masses often say that "the size of the crab depends on the water plants". Therefore, it is necessary to make great efforts to plant aquatic plants for crabs cultured in ponds. The aquatic plants mainly include duckweed, Azolla, water hyacinth, water hyacinth, hydrilla verticillata, Ceratophyllum demersum, Sophora alopecuroides, Alternanthera philoxeroides, etc., and attention should be paid to disinfection and prevention when transplanting.

3. Anti-escape facilities: The anti-escape facilities mostly use plastic film, but also cement board, depending on their own situation.

4. Disinfection of pond cleaning: Generally, the pond is disinfected with quicklime for half a month before the seedlings are released, and the dosage is 75 kg per mu. On the one hand, it can kill harmful organisms, on the other hand, it can improve the bottom of the pond, increase the content of calcium ions in the water, and promote the growth of crabs. Fertilize in time after receiving water, cultivate algae and basic bait, and the transparency should generally be kept at 40-50 cm. If tadpoles or frog eggs are found, they should be removed in time to avoid competing for food and harming young crabs.