These crabs flat round body, the whole body green, there is a big shell on the back, like a warrior in armor, eyes as big as a grain of rice, mouth a closed, the house is particularly quiet when you can hear the crab mouth can not stop hissing; the most striking part of its legs, eight legs evenly distributed on both sides of the body, the most powerful or the two sharp and incomparable pincers, "pincer mouth" above and below a row of small teeth, pincers also have black hairs. "Pincer mouth" up and down also has a row of small teeth, pincers on the black hair it.

The crab's shell is very hard, with some faint patterns on it. Its eyes are small, like two black grains of rice, and shrink back when touched. The crab's two front claws are like pincers, it hurts to be pinched by it, and if you tease it with a straw stick, it gets angry, and the two 'pincers' are lifted up to a high level, like Mei Chaofeng's Iron Sand Palm in the TV series "The Legend of the Shooting Eagles and the Heroes", which can be very powerful!