The scientific name of sea crab is Portunus trituberculatus.

In order to survive, sea crabs must contain a lot of sodium ions in the water. On the other hand, because of the high osmotic rolling resistance, sea crabs directly enter fresh water culture, and it is easy to die because of pressure changes. Therefore, sea crabs need salt aquaculture to breed, so they need to buy special aquaculture and sea salt modulation in the market. Or it can be cultured in seawater.

The water quality requires that the water temperature should be above 18℃, the daily temperature difference should be less than 8℃, the salinity should be 18 ~ 32, the pH value should be 7.8 ~ 8.6, the ammonia nitrogen content should be less than 1 mg/L, the dissolved oxygen should exceed 5 mg/L, and the water transparency should be maintained at 30 ~ L.

Extended data:

Salinity control of cultured sea crabs;

The suitable salinity is 13 ~ 38, and the optimum growth salinity is 20 ~ 35. The overwintering salinity is 28 ~ 35. If the salinity is below 8 or above, stop eating and activities, and all die after one day.

Matters needing attention in raising sea crabs:

1, clean the pond

The consolidation of the pond is mainly to remove excessive silt at the bottom of the pond, make the bottom of the pond loose and exposed to the sun, and maintain the supporting facilities such as dikes, gates and canals.

2. Prevention and treatment of bacterial diseases

In order to prevent the spread of bacterial diseases, we should strengthen aquaculture management, avoid mechanical damage, and remove sick crabs in time.

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