When buying crabs, you can buy a straw bag, put live crabs in the straw bag, and then put the straw bag in the freezer.

Oxygen-increasing equipment:

Put the oxygen-increasing equipment into a bucket or basin filled with water, put the swimming crab in, and turn on the oxygen-increasing equipment.

Use a bucket or basin:

Put the swimming crab into a basin or barrel with a wide bottom and smooth inner wall, and then pour in water, which can submerge about half or less of the swimming crab's body. Never bury all the swimming crabs, or the crabs will suffocate due to lack of oxygen and put them in a slightly cool place.

Save in the refrigerator:

Touch the eyes of Portunus trituberculatus with your hands, pick them out if they are sensitive, then tie the feet of Portunus trituberculatus with a rope, put them in the fresh-keeping room of the refrigerator, and cover them with a wet towel to keep them moist.

How long can Portunus crab be kept?

Portunus must not be kept for too long, so it is recommended to eat it as soon as possible.

Under normal circumstances, swimming crabs can still be preserved for about three months if they are frozen. However, it is suggested that the bought swimming crab should be eaten within three days, because if it is left too long, the nutrients in the swimming crab will gradually decrease, the nutritional value will gradually decrease, and the best taste will not be so delicious.