小瓜虫俗称“白点”病,一旦发生,则传染快,流行面广,危害性大,必须及时防止。小瓜虫圆形或椭圆形,周缘具毛、内具各种颗粒;成熟时可见到马蹄形大核,寄生于鳃皮肤及鳍等处。皮肤及鳍寄生时可见体表具点状白色孢囊,严重时病鱼粘液分泌增多,形体消瘦;发病时以 Small melon commonly known as “white spots” disease, in the event of infection is fast, a wide range of popular, harmful, we must prevent in time. Small melon round or oval, with a hair around, with a variety of particles; mature can be seen when the horseshoe-shaped nuclear, parasitic on the gill skin and fins and other places. Parasitic skin and fins can be seen when the surface with a white punctate cytoplasm, severe disease, increased mucus secretion, body weight loss; when the disease