The lifespan of blue crabs is usually about 5 years. Of course, when raising blue crabs, its feeding method has a great impact on lifespan.

The first way to effectively control the disease is to change the water frequently, at least every Zhou insisted on changing the water 10 times, and the water must be clear and transparent. It is also very important to give it enough living space, at least a 3750px aquarium is required to raise a blue hanging that can grow to more than 500px. Do not keep only one, otherwise it will easily go on hunger strike due to isolation, or suffer from digestive system diseases and die. In addition, the blue hanger erects all of its fins when it is caught, so it is often hung on the net and difficult to remove after it has been fished. The best way to fish is with a water ladle, a small pot, or a knotless net.