The predator of all predators arrives.
捕食者中的捕食者出现了。
Orcas.
虎鲸。
As smart and cooperative as a common dolphin, and three times bigger.
与普通的海豚一样聪明,一样懂得协作,但体型却要大出三倍。
Orcas never used to travel for the sardine run, but now they swim thousands of miles to intercept the shoals.
以前虎鲸从不追捕沙丁鱼,但现在,它们游了数千英里来追击鱼群。
But it's not the sardines they're after.
不过它们追捕的并不是沙丁鱼。
They're here to hunt dolphins.
而是海豚。
Not chasing anymore, but running.
海豚不再追赶,而是逃跑。
The orcas are not only more powerful, they have more stamina.
虎鲸不仅更强大,而且耐力也更持久。
Just as the dolphins corralled the fish, now the orcas work the dolphins.
就像海豚围剿沙丁鱼那样,现在虎鲸也在围剿海豚。
They isolate one from the pod.
它们把一只海豚从群体中分离出来。
Once they've locked onto their target, they tag team, chasing it, exhausting it, then ramming it.
一旦锁定目标,它们就会协作,追赶,消耗海豚的体力,然后撞击它。
They attack again and again until the dolphin can no longer swim.
它们一次又一次进攻,直到海豚再也游不动为止。