Refrigerator preservation: Bundle up the crab's feet and pincers and put them into the refrigerator's freezer layer, cover the crab with a wet towel, and touch the crab's eyes with your hand every 1 day, and eat them immediately if they become unresponsive. Plastic bucket preservation: Put the crabs into a plastic bucket and add water to about half of their body, usually can be kept for 3-5 days. Bathtub preservation: put the crab into an unused bathtub, add water to about half of its body, generally can be kept for 3-5 days.