The biggest feature of fiddler crabs is a pair of claws of different sizes. The big claws placed on the chest are like the shields of warriors. Fiddler crabs are called fiddler crabs because they can dance with big claws. The purpose of this "tidal wave" action is to intimidate the enemy with big claws, or to make love. English is called fiddler crab, because two pliers are also like violins. Only the male crab has big claws, while the female crab has small claws. In addition, fiddler crabs have matchstick-like eyes, which are very special.

Because whenever the tide ebbs, they will climb out of the cave and run back and forth on the beach above the water for food. And whenever the tide is rolling and rising, and it is about to submerge their nests, they hold their strong paws high at the mouth of the cave, as if waving their hands to welcome the arrival of the tide, and then carry the hole cover, and when the tide overflows, they hide in the nest and cover the hole. So people call it fiddler crab.

It wields a big aojiang to intimidate the enemy or make love.

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