Those that make it upstream develop into opaque elvers.
那些成功抵达上游的鱼变成了不透明的鳗鱼。
双语版 TED-Ed 演讲精选
Having finally arrived in their hunting grounds, elvers begin to eat everything they can fit into their mouths.
在终于抵达狩猎场后,它们开始吞食任何能吃的东西。
双语版 TED-Ed 演讲精选
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.
An eel is any fish belonging to the order Anguilliformes (/æŋˌɡwɪlᵻˈfɔːrmiːz/), which consists of four suborders, 20 families, 111 genera and about 800 species. Most eels are predators. The term "eel" (originally referring to the European eel) is also used for some other similarly shaped fish, such as electric eels and spiny eels, but these are not members of the Anguilliformes order.