Because Portunus trituberculatus is a fresh aquatic product, it has a short storage time after leaving water, so it is best to buy a quantity that can be eaten within 3 days. If you can't finish eating, you can temporarily tie up the feet of Portunus trituberculatus, then put them in the freezer of the refrigerator and cover them with wet towels for preservation.

When eating every day, choose the swimming crab with insufficient vitality and sufficient vitality to keep it. Of course, to preserve the swimming crab, the first thing is to keep it alive, and the second is to keep it fat and not lose weight.

Extended data:

If there is not enough space in the refrigerator at home, you can also use plastic buckets or pots to keep it. Prepare a plastic bucket or basin with a height of 30 to 50 cm. The inner wall is smooth and difficult to escape. First put the swimming crab in, be careful not to fold it, and then add water to half the height of the swimming crab. Water must not drown the swimming crab, because the water is too deep, and the swimming crab will die of hypoxia and suffocation.

Of course, in the case that the temperature is not too high, the swimming crab can also be preserved in this way. Generally, it can be stored for 5 to 7 days, and eating it within 3 days will not affect the taste. It should be noted that the preservation is based on the principle of immobility, low temperature, darkness and moisturizing. Besides, if you don't eat it right away, please don't wash it with water, or the swimming crab will die.