It is best not to eat them, because dead crabs will contain certain toxins in their bodies, which are not good for your health. If you put live crabs in the refrigerator, they can only be placed in the refrigerator, not the freezer. They will definitely die if the temperature is low or below zero.

The details are as follows:

1. Introduction

Crab (páng xiè): Animal Kingdom, Arthropoda, Crustacea, Softshell Class, True Soft Onychopods, decapods, ventral suborders, and short-tailed suborders. It is a crustacean (crustacean). Its body is protected by a hard shell and it breathes through gills. In terms of biological taxonomy, it is the same animal as shrimp, lobster, and hermit crab. Most types of crabs live in the sea or offshore areas, and some live in freshwater or land. They rely on female crabs to give birth to baby crabs, and each time the female crab lays a large number of eggs, the number can reach millions or more. Crabs rely on the geomagnetic field to determine direction. China has a long history of crab-eating, which is recorded in "Yi Zhou Shu Wang Hui Jie" and "Zhou Li Tian Guan Bao Ren".

2. Competition

Crabs eat other animals, and other animals may also eat crabs. For example, humans regard crabs as delicacies, and water birds also eat crabs. Some fish also eat crabs. Like humans, they love eating crab legs. When young and immature crabs float in groups in the sea, they may be preyed upon by other marine organisms. Therefore, crabs must lay a large number of eggs when spawning to ensure the survival rate of the crabs.

3. Reproduction

They rely on female crabs to give birth to baby crabs. Each time, the female crab will lay a lot of eggs, the number can reach millions or more. After these eggs hatch in the abdomen of the mother crab, the larvae can break away from the mother and float around with the coastal currents. After several shellings, the big-eyed larvae grow into big-eyed larvae. The big-eyed larvaes grow into young crabs after several shellings. The appearance of the young crabs is almost the same as that of adult crabs. After several more shellings, they turn into crabs [1 ]?. Most saltwater crabs release their eggs directly into the ocean without hatching after their eggs mature.