On August 31, 2018, the crab that enrol tide besmears in beach of bayou of bay of Qingdao rubber administrative division activity. Besmear of big talk beach is collected to go up in white Sha He and ink river photograph, growing thickly to enrol wet crab in great quantities, brandish demonstrate of a big sting, another small sting eats sand drossy etc, abundant of bud bud Da constant interesting. The crab that enrol tide has the outstanding eye like club of a pair of match, high vertical stroke has two eyes when foraging, all round observation activity. Once discover a circumstance, in be being gotten quickly into the hole. A large number of small sanded crab all over beach besmear. The citizen catchs crab. The feature with the biggest crab that enrol tide is a pair of chela of magnitude wide gap, the big chela that places advanced bosom resembles the shield that is a cavalier. Enrol wet crab to be able to make the motion that waves big chela, it is the crab that enrol tide because of what this is weighed. This " action is current " movement, the purpose is to use big pincers comminatory enemy, or it is courtship.