Any of various primitive elongated freshwater or anadromousfishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.
七鳃鳗，八目鳗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。
2
Any of various freshwater or anadromous food and game fishes of the family Salmonidae, especially of the genera Salmo and Salvelinus, usually having a streamlined, speckled.