鳗拟指环虫属于蠕虫类，吸虫纲、单殖亚纲，鳗拟指环虫（Ｐｓｅｕｄｏｄａｃｔｙｌｏｇｙｒｕｓ ａｎｇｕｉｌｌａ）。据报告，它是已发现寄生在鱼类二百余种指环虫中最凶狠、顽强的种类。由镜检可见，其头前端有四叶，头背侧有黑色眼点，体呈浅灰色（鲢、鲩等寄生虫体透明浅白 Eel refers to the Central worm belongs to the class of worms, Trematoda, Monodon subclass, eel ring worm (Pseudodactylogyrus anguilla). It is reported to have been the most fiercely tenacious species that have been found to harbor more than 200 finger worms in fish. Visible by microscopy, the front of its head has four leaves, the back of the head with black eyes, the body was light gray (silver carp, chrysalis and other parasite transparent plain