一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无颌的吮吸嘴，嘴内有锉牙

一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无颌的吮吸嘴，嘴内有锉牙的英文翻译

基本释义

• any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae,characteristically having a jawless sucking mouth with rasping teeth