We're trying to understand the behavior of baleen whales, of minke whales and humpback whales.

我们试图了解须、小须座头的行为。

We can see we see fin whales, humpbacks, minkes...the occasional blue whale.

我们可以看到须、座头、小须......偶尔会看到蓝。

Scientists studied three species of baleen whales – blue, fin and humpback.

科学家研究了三须——蓝、须座头。

Fin Whales are an endangered species.

须是濒危物。

The three were humpback, minke and sei whales.

这三头分别是座头、小须须。

Baleen whales are born without teeth.

须生来就没有牙齿。

The minke whale is black, grey, or purple in color.

小须的颜色有黑色、灰色或紫色。

Perhaps, though, baleen whales might continue to evolve and get bigger still.

不过，也许须会继续进化，变得更大。

The whale awaits their approach, floating on the surface.

须在水面游动，等待着他们靠近。

Baleen whales are the gentle giants of the sea.

须是海洋中温的庞然大物。

This is true for blue whales, fin whales, and humpback whales.

蓝、须座头都是如此。

On the first day of the hunt, two minke whales were killed.

捕的第一天，有2只小须被杀。

Baleen whales do not have teeth or vocal cords like humans and other mammals.

须不像人类其他哺乳动物那样有牙齿或声带。

Most baleen whales do not eat year-round.

大多数须不是全年都在吃东西。

But the ancestors of baleen whales had a very different diet.

但是须祖先的饮食习惯与这些后代的差别非常大。

Both toothed and baleen whales often hunt by diving deep-prey being more abundant at depth.

齿须通常都潜入深海捕食，因为深海里的猎物更多。

The biggest whales of all (blue, humpback and so on) are baleen whales.

所有中最大的类（蓝、座头等）是须。

The boats were lowered, in hope of easily capturing the prize.

为了更容易捕捉到这只须，他们把船往下放了一些。

In 2013 researchers attached sensors to two Antarctic minke whales.

2013年，科学家们在两头南极小须身上安装了传感器。

Well, baleen whales emit sounds around 14 hertz, the deepest among mammals.

须能发出 14 赫兹左右的声音，是哺乳动物中最低沉的。