近年来 ,在欧洲鳗鲡 (Ａｎｇｕｉｌｌａａｎｇｕｉｌｌａ)的养殖过程中常发生“狂游病”。发病前 ,出现食欲极为旺盛 ,异常抢食现象。数日后离群、不摄食、旋转式游动、侧游或在水面上呈挣扎状急游 ,数秒后沉入水中 ,再上浮挣扎状游动 ,往复进行。 2～ 3天后病鳗出现呼吸困难 , In recent years, “madness disease” often occurs during the culture of Anguillaanguilla in Europe. Before the onset of appetite is extremely strong, abnormal snatch phenomenon. A few days later, out of group, do not feed, rotary swimming, swim sideways or struggling in the water on the urgent trip, sink into the water after a few seconds, and then floating struggling swimming, reciprocating. 2 to 3 days after the disease eel breathing difficulties,