1, the growing environment is different: the red crab mainly grows in the warm sea area, while the hairy crab mainly lives in the freshwater environment, such as rivers, streams, lakes and so on.

2, the appearance of different: red crab body shape is flatter, oval in appearance, the head and chest part is more like a small jagged fan, body color green. The body shape of the hairy crab is nearly round, the most important feature is the two large chelipeds with black and gray dense fine velvet, the back of the cephalothorax armor is grass green or dark green, the abdomen is grayish-white.