Can swimming crabs be cultured in fresh water?

Portunus crab cannot be cultured in fresh water. This is because swimming crabs live in the ocean, and their survival rate is greatly reduced after leaving a high-salinity and high-oxygen environment.

Portunus crab adapts to salinity:

The adaptable salinity is 13~38‰, and the optimum growth salinity is 20~35‰. The winter adaptation salinity is 28~35‰. When the salinity is lower than 8‰ or higher than 38‰, they stop eating and moving, and all die after one day.

Extended information:

Portunus crab related events:

In December 2010, about 40,000 dead crabs washed ashore along the coastline of Kent, England. Environmental experts It is believed that cold weather may be the cause of the swimming crabs' death. The swimming crabs are believed to have been victims of the UK's coldest December in 120 years, which caused sea temperatures to drop significantly below normal.

Tony, head of Coast Guard in Kent, said: "We suspect that climate change and warmer weather are enticing crabs to head to coastlines, possibly in search of seaweed. "We believe that the sudden drop in temperatures has Crabs will die due to low temperatures.”

Nonetheless, the person in charge of an environmental organization told this reporter that extreme events cannot be directly linked to climate change. Climate change is complex. Atmospheric phenomena, the specific causes must be determined through accurate data and computer models.

Reference: Baidu Encyclopedia - Swimming Crab