Saw margin blue crab big eye larvae period, the water temperature can be 27 ~ 32 ℃, in the larval cultivation period, if the water temperature drops to 22 ℃, the larval development is slow, 20 ℃ can cause death. The suitable water temperature for the growth of saw edge blue crab is 15～30℃, the optimal water temperature is 18～25℃, lower than 12℃ or higher than 32℃ are unfavorable to the growth of the crab.

The salinity of the saw-edge blue crab has a wide range of adaptability, in 2.6 ‰ ~ 33 ‰ can be better growth and development and mating, the optimal salinity of 13 ‰ ~ 27 ‰. In the larval cultivation period, especially to prevent the salinity of the substantial rise and fall, according to research, saw edge blue crab big eye larval growth suitable salinity is 23 ‰ ~ 31 ‰. China's coastline is long, different regions of the saw-edge blue crab on the salinity of the adaptive range is also different, Guangdong, Guangxi saw-edge blue crab on the salinity of the adaptive range of 13.7 ‰ ~ 26.9 ‰.

During the juvenile period, the pH is kept at 7.8-8.6, which is favorable for the development and growth of juveniles, and the pH of the pool water during the adult period is kept at 7.8-8.4, which is more suitable.

Oxygen content during the juvenile period is maintained at more than 4mg/liter, and the dissolved oxygen in the pool water during the adult period is more than 3mg/liter, so that the blue crab can live well. Therefore, when the amount of dissolved oxygen is insufficient, it is necessary to take more water and open the oxygenator to increase the amount of dissolved oxygen. In the crab pool mixed some Gracilaria, can play the role of shade and increase the role of dissolved oxygen in the pool water.

refers to the degree (depth) of light penetration into the water. The transparency of the crab pond reflects the amount of plankton, sediment and other suspended substances in the water. The transparency of the pond water during the cultivation period should be 30-40 centimeters. Too little or too much transparency is unfavorable to the life of saw-margined blue crabs.

? In order to prevent the pool dirt, residual bait and feces and other corrupted water quality, it is necessary to clean up in a timely manner. In addition to fishing at any time in the pond patrol, but also in the ebb tide, the pool water fully stirred, so that corruption suspended in the water surface, open the gate, so that it is discharged with the water flow out of the pool, and then to be high tide water level, seawater is clearer and then injected into the fresh seawater.