The number of days crabs can be kept varies in different environments, for example, they can be kept at room temperature for 1 to 2 days.

Fresh crabs, which can be left out of the refrigerator if the room temperature does not exceed 15 degrees, are usually able to keep for 2 to 3 days. If the room temperature is too high, they need to be placed in the refrigerator. You can tie up the legs of the crabs to reduce the physical exertion of the crabs. Then place them one by one in the freezer drawer of the refrigerator, and take a clean towel, moisten it with water, wring it gently and lay it flat on the body of the crabs. In this way, the crabs can usually be kept for 2 to 3 days.

Bundle the crabs and put them in a freezer drawer and keep them directly frozen, which can generally be kept for about 1~2 months. When preserving crabs, you can use the appropriate method so that you can eat fresh crabs.

Morphological characteristics of crabs

The body of the crab is symmetrical on the left and right, and can be distinguished as frontal area, eye area, heart area, liver area, stomach area, intestinal area and gill area. The crab's thorax has five pairs of appendages called thoracic peduncles. A pair of appendages located in front of the strong chelae, can be done to forage for food, the remaining four pairs of appendages is the crab's feet, the crab walks to move to rely on these four pairs of appendages.

They walk in a unique and interesting way, mostly sideways rather than straight ahead. The exception is the monk crab, which walks straight ahead. Based on the characteristic that the 2 stepping feet at the end of the crab's tail are less involved in walking, a 6-legged lateral movement walking mechanism has been developed by imitating the crab's walking style, and its motion characteristics have been investigated to meet the requirements for traveling on rigid ground and soft ground involved in agricultural production.