Now, many miles from their natural home,
現在 家鄉已在數英里之外
and in response to an unknown cue,
或許是收到某種未知的信號
they stop and begin to circle.
他們停下來開始圍成一圈
Other marine fish that migrate upriver
其他海洋魚類逆流而上
usually do so in order to breed,
通常是為了繁殖后代
but there's no evidence that these kingfish spawn up here.
但沒有跡象表明無鰾石首魚在淡水河中產卵
Neither do they hunt.
他們也不是來捕食的
So what are they doing?
他們究竟在干什么
In truth, the purpose of this strange behaviour is still unknown.
事實上這種怪異行為的目的至今不為人知
Within a few weeks,
幾個星期之后
they will retrace their journey back to the ocean.
他們會沿著來路返回大海
The lives of kingfish,
無鰾石首魚的生活
like those of turtles and butterflies and pelicans,
與海龜 蝴蝶和鵜鶘一樣
are influenced by the Agulhas Current.
都受到厄加勒斯洋流的影響