指环虫系鲤科鱼类中最常见的单殖吸虫,由此类吸虫导致的疾病,通称为指环虫病。国内淡水鱼常见的指环虫有五种:鳃片指环虫、草鱼指环虫、小鞘指环虫、宽基指环虫、大钩指环虫。指环虫虫体较小,长度通常不超过2毫米,前固着器为由头腺结构的头器;后固着器为盘状,内有7对边缘小钩、 Finger ring worm is the most common carp genus Monascus, the disease caused by such flukes, commonly known as ring worm disease. Common domestic freshwater fish finger ring worm there are five: gill film finger worm, grass finger worm, small sheath finger worm, finger ring worm, hook finger worm. The ring worm body is small, the length is usually not more than 2 mm, the front anchor by the structure of the head of the head gland; rear retainer for the disk, with 7 on the edge of the small hook,