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1·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。

2·Any of various primitive elongated freshwater or anadromous fishes 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。

3·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.

鳟鲑鱼科的各种淡水或溯河性食用及捕钓鱼，尤指鲑鱼属和红点鲑属，通常。

4·Salmon spawn in fresh water, but in many cases, the fish spend most of their lives at sea, returning to the rivers only to reproduce. This lifecycle is described as anadromous.

虽然作为淡水鱼类，三文鱼大部分时间都生活在海洋里，它们只在产卵期间回到淡水中，这种生活习性被称为溯河产卵。