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Can crab claws grow back when they are dropped?
Under normal circumstances, crabs can grow when their pliers are dropped. Crabs have strong regeneration ability, and they can grow back when pliers are dropped. Crabs have the ability to regenerate broken limbs. The fundamental reason is that the information of this function exists in the DNA of crabs. When the crab is in danger, it will instinctively let some meristem cells on the fracture of its broken limb divide, differentiate and grow, and gradually grow new limbs. It usually takes 45 days-100 days to grow a new limb.

If the crab is injured, the pliers can't be used or broken, it will be clipped off with another pliers. All crabs have the ability to regenerate broken limbs, repair wounds and regenerate lost organs. The regeneration time is related to the feeding environment and nutrition. This phenomenon is very common in the animal kingdom, and crabs are no exception.

It is often seen that some crabs have a big pliers and a small pliers, which is very different. Small ones are generally new, and those that grow back are sometimes smaller.

Usually, a soft nodule grows on the surface of the self-cutting residue of crab claws, which is wrapped in a transparent chitin capsule called limb bud. After nearly half a month, limb buds quickly grew into segments, and gradually grew into epithelial tissues, striated muscle fibers, motor and sensory neurons. After that, it entered a slow growth stage that lasted for several months. Finally, near molting, limb buds begin to grow rapidly again, with obvious segments. The joints between segments grow completely, and there are sensory hairs and thorns on the surface. Sensory nerves are embedded in sensory hairs, and tissue growth is completed here. After molting, the limb bud removes the chitin sac and forms a new foot.

Why do crabs fall when they are scalded by hot water?

Because crabs are still alive when they enter hot water, they will struggle instinctively after being stimulated by hot water, and the cooked leg meat has lost its toughness and naturally falls off. If you want to be a crab without losing your legs, there are generally the following methods:

1. Punch a metal needle into the crab head (in the middle of the bubble mouth) for at least 1cm, and then cook it after stabbing to death;

2. Tie the leg with a rope so that the crab can't struggle, and then cook it;

3. Soak crabs in cooking wine to make them drunk before cooking.