1. Swimming crabs are suitable for living in water temperatures of 8-31°C, and the optimal water temperature for growth is 15.5-26.0°C. 2. Suitable for salinity is 20-35%, but it can also survive when salinity is 13-18%. 3. Wild swimming crabs have harder shells and stronger crab legs, while artificially cultured crabs have thinner shells and less powerful crab legs. 4. The belly of wild swimming crabs is bright and shiny, while the belly and joints of artificially cultivated crabs will be black.

1. What is the temperature and salinity of swimming crabs?

1. Temperature and salinity

(1) The suitable water temperature for swimming crabs is around 8-31°C. The suitable growth water temperature is 15.5-26.0℃.

(2) Swimming crab is euryhaline and its suitable salinity is 20-35%, but it can also survive at a salinity of 13-18%.

2. Breeding methods

(1) Construction of ponds

Swimming crabs are suitable for growing in sea water. Salt water must be prepared and the water quality is pollution-free. Put some small fish and shrimps in the water to provide natural food for swimming crabs. When building a pool, you can leave a portion of the land area and spread an appropriate amount of sand to satisfy the swimming crab's habit of throwing sand and basking in the sun.

(2) Pond disinfection

Drain the water in the pond and remove the silt at the bottom, leaving only a small amount. Place some containers such as water bottles at the bottom to provide swimming crabs with a suitable adjustment space. After cleaning the pond, you can inject an appropriate amount of water and apply an appropriate amount of fertilizer. After a few days, swimming crab seedlings can be released.

(3) Release crab seedlings

When releasing seedlings, crab seedlings should be fed separately according to their size. The temperature of the pool should not be lower than 20°C, and should not change too much up and down. The water temperature needs to be strictly adjusted according to changes in air temperature.

(4) Daily management

Adjust the water temperature in time and replace the pond water in time. When the climate is hot in summer, the water needs to be changed twice a week. When the climate is hot, the appetite of swimming crabs will decrease. You can feed them some small fish and shrimps that swimming crabs like. Pay attention to the oxygen content of the pool. When there is less oxygen, large areas of swimming crabs may die.

2. What are the differences between farmed and wild swimming crabs?

1. Shell

Wild swimming crabs have greater activity, all parts of the body are strong, and the shell is more The crab legs are harder and more powerful. The cultured swimming crabs have less natural enemies, so they have less activity, their shells are slightly thinner, and their legs are average in strength.

2. Belly

The belly of wild swimming crabs looks bright and shiny, with less sediment content in the body, while artificially cultured swimming crabs have belly gaps and crab claw joints. There are signs of blackening.

3. Crab legs

Wild swimming crab legs and claws are more mobile and longer, while artificially cultured crab claws and legs are slightly shorter.

4. Taste

The meat of wild swimming crabs is whiter, more tender and more delicate than artificially cultured crabs, and the fragrance is richer.