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。
Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.
彩虹鳟中的溯河产卵海鱼，较淡水种类体型大，斑点颜色淡。
The anadromous variety of rainbow trout, being larger and having darker spots than the freshwater variety.
彩虹鳟中的溯河产卵海鱼，较淡水种类体型大，斑点颜色淡。
The anadromous variety of rainbow trout, being larger and having darker spots than the freshwater variety.
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