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Another predator is on the prowl.
還有掠食者在游弋。
The aptly named ragged tooth shark.
南非虎頭鯊。
Raggies grow to three meters long, but they share these waters with a shark twice their size.
虎頭鯊可以長到3米長，不過還有2倍于它的鯊魚在和它們一起分享這片水域。
The great white. The largest predatory fish on the planet.
大白鯊。地球上最大的掠食性魚類。
Each dawn cape fur seals leave their colony to go fishing.
黎明時(shí)分，南非海狗離開聚居地去捕魚。
To reach the open sea, they must cross a narrow strip of water
要到達(dá)遠(yuǎn)海，它們必須穿越一片狹窄的水域，
and that is patrolled by great whites.
大白鯊就在那里逡巡。
Each seal is indeed swimming for it's life.
每只海豹必須拼命游泳。
The shark relies on surprise.
可大白鯊讓人驚奇。
The great white's turn of speed is powered by a high metabolism.
大白鯊的速度和力量來自體內(nèi)高速的新陳代謝。
They only thrive in cold temperate seas,
它們只呆在冰冷的海里，
for only these waters contain sufficient food necessary to fuel such a ravenous predator.
也只有大海才有充足的食物供這種貪婪的掠食者享用。
