河蟹一般情况下生活在水底，但有时也会爬出水面，在水草或陆地边活动。如果河蟹经常上岸，不论白大黑夜都不下水，特别是6～8月河蟹摄食生长旺季常常爬出，说明河蟹生长不顺。养殖户对此应及时采取措施，否则．影响成活率。1．寻觅食物；河蟹大多大夜里摄食，但如果饥饿，白天 Under normal circumstances, crabs live underwater, but sometimes they climb out of the water and move on plants or land. If the crabs often go ashore, whether the white big night without water, especially from June to August crab feeding growing season often climbed out, indicating crab growth is not smooth. Farmers should take timely measures to this effect, otherwise. Affect the survival rate. 1. Looking for food; crabs eat mostly at night, but if hungry, during the day