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Ours is truly a blue planet.
地球確實是個藍色的星球
Water covers most of the world's surface.
地表大部分被水覆蓋
Here we are the outsiders.
這里不是我們的地方
But under the waves one group thrives.
但有一群生物 在海浪下蓬勃發展
Fish.
魚類
Fish are masters of the waters.
魚類是水中之王
And sailfish are the fastest of them all.
其中以旗魚的速度最快
Their speed makes them one of the ocean's most fearsome predators.
它們靠速度成為 海洋最恐怖的掠食動物
Off the coast of Mexico,
在墨西哥外海
30 sailfish have surrounded a ball of sardines.
三十條旗魚包圍了一群沙丁魚
To catch their prey requires more than speed alone.
要捕捉獵物不光要速度快而已
In the tightest turns, fins maintain stability.
即使最迫切的急轉彎 魚鰭依然穩如泰山
Their sickle-shaped tail powers them forwards
它們靠鐮刀狀的尾巴向前推進
and that extraordinary dorsal fin helps intimidate their prey.
獨樹一格的背鰭 幫它們恫嚇獵物
To the naked eye, the action is too fast,
動作太快 肉眼看不見
slowed, their challenge becomes clear.
變成慢動作 就明白它們面對了什么挑戰
Just picking a target is hard enough.
光是挑選目標就夠棘手了
Knocking it off balance, separates it from the shoal.
讓獵物失去平衡和魚群分開
This requires extraordinary skill.
可需要不同凡響的技巧
