With some artificial seawater and sufficient oxygen supply to maintain the temperature at about 20 degrees, there is still no pressure!

Or use tap water and sea salt to make sea water (remember, never use table salt). There is a suitable range marked on the salinity meter. Sea salt, salinity meter and oxygen supply equipment can be purchased at a store specializing in seawater aquariums or online. This kind of crab is large in size and consumes a lot of oxygen, and it is best to be raised in a large tank. When feeding, use fish, shrimp or snail meat.