八目鳗 bā mù mán

八目鳗（Lampetra japonica），学名七鳃鳗，是一种七鳃鳗纲的动物。它的特点是嘴呈圆筒形，没有上下腭，口内有锋利的牙齿。八目鳗类鱼是一种奇怪的动物：它通过啃咬的方式八目鳗类鱼进入动物尸体中进食，甚至可以在其中呆上长达3三天之久。 加拿大的英属哥伦比亚大学的科学家们认为八目鳗类鱼这种可怕的进食方式会因为本身产生的二氧化碳造成动物尸体中所积存的水质变酸。世界上共有30多种八目鳗，它们属于盲鳗目。最常见的大西洋八目鳗是（Myxine glutinosa）盲鳗；太平洋八目鳗是盲鳗属（Eptatretus stoutii）。

百度翻译提供：

Lampetra japonica (Lampetra japonica), scientific name of Lampetra japonica, is an animal of Lampetra. It is characterized by a cylindrical mouth, no upper and lower palates, and sharp teeth in the mouth. The lamprey is a strange animal: it feeds on animal carcasses by biting, and can even stay in them for up to three days. Scientists at the University of British Columbia in Canada believe that the terrible eating method of lampreys can cause the water quality stored in animal carcasses to become sour due to the carbon dioxide produced by them. There are more than 30 species of lampreys in the world, belonging to the order lampreys. The most common Atlantic lamprey is myxine glutinosa; The Pacific Lamprey is the genus aptatretus STOUTII.