The image of a dorsal fin cutting through the sea surface is iconic.

背鳍划破海面是种标志性画面。

So now we're putting in an identification spaghetti tag right into the dorsal fin.

所以现在要在背鳍上放一个识别标签。

They can be identified by the lack of a part of a body often seen on other whales: a dorsal fin.

人们可以通过缺少在其他鲸鱼身上常见的身体部位来识别这种鲸鱼：背鳍。

It had no jaws, and no dorsal or side fins.

它没有下巴，也没有背鳍或侧鳍。

They also had a sharp leg dorsal fin.

他们还有一个锋利的腿背鳍。

It's thought that the angling structure evolved from the spines of the fish's dorsal fin.

人们认为钓鱼结构是从鱼背鳍的刺进化而来的。

Sharks don't have to surface and show us that telltale dorsal fin like in Jaws because we're around and to prove they exist.

鲨鱼不是非得游上来像电影大白鲨似的让我们看到暴露身份的背鳍，因为在我们周围要证明它们的存在。

He takes photos of their dorsal fins. Each notch, scar, and blemish is a unique fingerprint that allows scientists to identify individual animals.

他拍摄了那些海豚的背鳍照片。每一个划痕、伤疤和小瑕疵都是独特的印记，这些印记可以让科学家们认出它们谁是谁。

Those animals are only members of the genus Balaenoptera furnished with dorsal fins, and like sperm whales, they're generally smaller than the bowhead whale.

这些东西不过是鲸科，有脊鳍的动物，大头鲸也一样。它们通常比普通白鲸小一些啊！

He could see their tall, black dorsal fins poking up out of the water, flashes of their white eye markings.

安妮：他可以看到它们高大的黑色背鳍从水中伸出，白色的眼斑闪烁。