在新开挖的鱼池中,经常会发现一些鱼的身体呈‘S’型弯曲、尾部粗短而弯曲,鲤盖凹凸不平,上下腭不齐,鱼鳍畸形,但它与磋伤、咬伤的畸形不同,主要是没有伤疤。这是因为新开挖鱼池中含重金属盐类多,造成骨骼变形所致。老鱼池土壤中的重金属盐类大都溶解了,一般不发此病。鱼类患了畸形病,行动不便食量减低,体质下降,易患其它疾病,生长缓慢, In newly excavated fish ponds, it is often found that some fish are bent in the shape of 'S', the tail is short and curved, the carp is uneven, the upper and lower palats are not together, and the fins are deformed. However, The deformity is different, mainly no scars. This is because the new excavation of fish ponds containing heavy metal salts, resulting in skeletal deformation caused. Most of the old fish pond soil heavy metal salts are dissolved, the general does not send the disease. Fish suffering from deformed disease, reduced appetite, physical decline, susceptibility to other diseases, slow growth,