1.主要症状发病初期,鱼体发黑、消瘦,眼球突出、肿胀,眼眶充血,眼睛单目或双目呈水泡状;游动时腹部朝上并发生阵发性狂游,上窜下跳,跃出水面,片刻间衰竭无力,漂浮于水面死去。死去的鱼躯体清瘦,尾柄细长,体表布满星条状粘液;胸鳍硬棘僵硬呈“八”字型;背鳍基部及脂鳍均呈现充血 1. The main symptoms Early onset, the fish black, thin, prominent prominence, swelling, orbital congestion, eyes were eyes or eyes were blisters; swimming belly up and the occurrence of paroxysmal madman, up and down jump , Jumped out of the water, a moment exhaustion, floating in the water dead. Dead fish body lean, caudal slender, body surface covered with star-shaped mucus; pectoral stiff stiff spine was “eight” shape; dorsal fin base and fat fins are congestive