一、症状： 病鱼临床表现为食欲减退；生长发育迟缓；游动无力，有时痉挛窜游；体色暗晦，或体表局部发生溃烂病灶；反应迟钝，反抗力弱，呼吸困难，抗病能力及抗应激能力降低。常伴有细菌性感染，捕捞与运输极度不安，全身很快充血或出血变红。出水后或运输过程大批死亡。 解 First, the symptoms: diseased fish clinical manifestations of loss of appetite; growth and development retardation; swimming weakness, and sometimes spasmodic channeling; body color dark or body surface ulcerative lesions; unresponsive, weak resistance, difficulty breathing, disease resistance Ability and anti-stress ability to reduce. Often accompanied by bacterial infections, fishing and transport extremely disturbed, the body quickly congestion or bleeding reddening. After the water or transport a large number of deaths. solution