Yet, despite their size, they often go unnoticed.

然而，儘管體型龐大，牠們往往不引人注目。

A type of camouflage, known as countershading gives these sharks the predatory edge.

一種被稱為反影偽裝的偽裝方式使這些鯊魚具有掠奪性的優勢。

They're dark on top, but pale underneath.

牠們上半部是深色的，但下半部是白色的。

So underwater, they blend into the background, whether seen from above or below.

所以在水下，無論從上面還是下面看，牠們都與背景融為一體。

But all that changes from the air.

但這一切，在空中都不一樣了。

ANDY: All right.

安迪：好。

Here we go, tethered drone. Taking off.

來吧，繫留無人機起飛。

From high in the sky, a shark's camouflage can't hide them, and their cover will be blown.

從高空往下看，鯊魚無所遁形。

ANDY: Let's try to find some sharks here.

安迪：來看看鯊魚在哪。

The best view of what's below the surface comes from high above.

觀察海面下物體的最佳視角就是高處。

Andy's drone scans from the sky.

安迪的無人機從空中掃視。

And while down at water level, it looks like every other day at the beach,

在海面上，這就像海灘上平平無奇的一天。

the view from above--

而從上方看 --

Woah, woah, right there.

哇，哇，在那裡。

reveals a very different story.

則揭示截然不同的樣貌。

A drone's eye view detects an unmistakable silhouette.

從無人機視角，發現了一個明顯的輪廓。

Now you see it, now you don't.

現在你看得到牠，這樣卻看不到。

ANDY: It's pretty incredible.

安迪：真是不可思議。

There's sharks everywhere, literally, right under the boards of these people,

到處都是鯊魚，就在這些人衝浪板正下方。

right under their noses, and they don't even see it.

就在他們眼皮底下，但他們卻沒發現。

Down at water level, glare and reflections can easily distract, hiding what looks obvious from high above.

在海平面，強光和反射很容易就會分散你的注意力，隱藏從高處看來很明顯的東西。

ANDY: I got a lot of sharks in the area.

安迪：我這區有很多鯊魚。

This is incredible.

不可思議。

It looks too close for comfort.

看起來實在太近了，令人不適。

But are people in danger?

但人們是否處於險境呢？

Despite Santa Barbara's increase in shark sightings, there hasn't been a fatal shark bite here, in almost a decade,

儘管在聖塔芭芭拉的鯊魚目擊事件有所增加，在近十年中，這裡還沒發生過鯊魚咬人致死事件。

a stat that today's survey will help unpack.

今天的調查將有助於揭示這一統計數據。

ANDY: Synchronize watches.

安迪：手錶同步。

All right, great white stakeout, here we go.

好了，大白鯊跟監行動，出發！

All right, and 3, 2, 1, here we go.

準備，3、2、1，開始！