Those that make it upstream develop into opaque elvers.
那些成功抵达上游鱼变成了不透鱼。
Having finally arrived in their hunting grounds, elvers begin to eat everything they can fit into their mouths.
在终抵达狩猎场后,它们开始何能吃东西。
Researchers were aware of leptocephali and glass eels, but no one guessed they were related to the elvers and yellow eels living hundreds of kilometers upstream.
研究人员知道细叶和玻璃,但没有人猜到它们与白叶和黄有关,后者生活在上游数百公里处。
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