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

我们试图了解须鲸、小须鲸和座头鲸行为。

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

我们可以看到长须鲸、座头鲸、小须鲸......偶尔会看到蓝鲸。

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

科学了三种须鲸——蓝鲸、长须鲸和座头鲸。

Fin Whales are an endangered species.

长须鲸是濒危物种。

The three were humpback, minke and sei whales.

这三头鲸分别是座头鲸、小须鲸和长须鲸。

Baleen whales are born without teeth.

须鲸生来就没有牙齿。

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

小须鲸有黑、灰或紫。

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

不过，也许须鲸会继续进化，变得更大。

The whale awaits their approach, floating on the surface.

长须鲸在水面游动，等待着他们靠近。

Baleen whales are the gentle giants of the sea.

须鲸是海洋中温和庞然大物。

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

蓝鲸、长须鲸和座头鲸都是如此。

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

捕鲸第一天，有2只小须鲸被杀。

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

须鲸不像人类和其他哺乳动物那样有牙齿或声带。

Most baleen whales do not eat year-round.

大多数须鲸不是全年都在吃东西。

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

但是须鲸祖先饮食习惯与这些后代差别非常大。

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

齿鲸和须鲸通常都潜入深海捕食，因为深海里猎物更多。

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

所有鲸中最大鲸类（蓝鲸、座头鲸等）是须鲸。

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

为了更容易捕捉到这只长须鲸，他们把船往下放了一些。

In 2013 researchers attached sensors to two Antarctic minke whales.

2013年，科学们在两头南极小须鲸身上安装了传感器。

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

须鲸能发出 14 赫兹左右声音，是哺乳动物中最低沉。