Generally speaking, it is best not to eat crabs when they are dead, especially river crabs that like to eat corrupted animal carcasses such as dead fish and shrimp in the water. Live crabs can be discharged from the body through metabolism, but dead crabs, in addition to the loss of the original fresh flavor, the protein in the body will breed bacteria, which will reproduce in large quantities, decompose the crab meat, and even produce toxins.

Crab is very tasty and is a popular food in the fall, but when it is dead and has been at room temperature for more than two hours, it cannot be eaten, and it should not be kept frozen for more than 24 hours.

There are many types of crabs, of which sea crabs are a little better than river crabs, generally eat dead (usually fished up dead), will be placed in the refrigerator for a day or two, frozen no more than half a month can be eaten.

Buy to smell the first odor, weighing the weight is too light, on the dead longer, may be in the sea on the dead, the best not to eat, but now the aquaculture industry is developed, so there are also live sea crabs.