What's the black on the crab clip?

As shown in the picture, the yellow part is the liver and pancreas, where crabs themselves overwinter to breed offspring, and the male and female crabs we like to eat are delicious, which is caused by the urgent fire in the cooking process. The black fluff on the crab claws is one of the characteristics of Eriocheir sinensis, which is a significant representation of the origin of the name of Eriocheir sinensis and the most important appearance characteristic that distinguishes Eriocheir sinensis from other sea crabs or amphibians. The function of fluff is to feel the change of external water environment, water flow vector, taste stimulation or danger.

Boiled Chinese mitten crab

Black, thick and thick crab hair.

There are hairs on the pliers for raising crabs in rice fields.

Mature crabs are densely covered with claws and feet, and crab larvae grow open.

Female crab seedlings also have the same fluff, but it is sparse.