Nearby, a humphead wrasse is undergoing a remarkable transformation.

不远处，只波唇鱼正在经历场非凡变化。

He's a bluestreak cleaner wrasse and he leads a very busy life.

他是条裂唇鱼，过着非常忙碌生活。

It opens its gills and the cleaner wrasse bustles in to begin the treatment.

它张开鳃，裂唇鱼匆忙进来开始清理。

Unlike corals, humphead wrasse can switch sexes, but they only exhibit one sex at a time.

跟珊瑚不同，波唇鱼可以变换性别，但它们个时间只能表现出个性别。

The wrasse changes colors, loses her eyeline, and grows dramatically.

波唇鱼改变颜色，失去眼线，快速变大。

Interestingly, this bluestreak cleaner wrasse that's grooming the humphead was also once a female.

有趣是，这条正在清洁波唇鱼蓝条清洁鱼也曾经是雌性。

And thousands of animals, from bluestreak cleaner wrasse to Humboldt squid, participate in same-sex sexual behavior.

数千种动物，从蓝条清洁鱼到洪堡乌贼，有同性性行为。

Like Allosaurus, the tubelip wrasse is a predator.

像异样，管唇濑鱼也是捕食者。

Well, the one I really love is this 2019 study on the cleaner wrasse fish.

嗯，我最喜欢是篇2019年关于清洁虾鱼研究。

A great example is the cleaner wrasse fish.

个很好例子是清洁虾虎鱼。

The cleaner wrasse is a small fish.

吸盘鱼是种小型鱼类。

The wrasse gets a free meal, and the other fish get cleaned.

鱼获免费进食, 其他鱼则被清洗干净。

Scientists thought the tubelip wrasse had plain, smooth lips.

科学家们认为管唇濑鱼嘴唇是平滑无奇。

You could think of a cleaner wrasse as running a type of business.

你可以把清洁鱼看作是在经营种生意。

The wrasse attracts fish by moving the back of its body up and down.

鱼尾藻通过上下移动身体后部来吸引鱼。

Researchers studying the tubelip wrasse found a far more sophisticated feeding strategy -- closer to a kiss… of death.

研究人员发现，管唇濑鱼捕食策略要复杂得多——更像是致命之吻。

The wrasse actually swims inside their mouths to clean them.

实际上, 长舌鱼在嘴里游来游去, 清洁嘴巴。

These fish need the wrasse, so they wouldn't harm it on purpose.

这些鱼需要这种鱼, 所以它们不会故意伤害它。

One good sign of health for our oceans is the mere existence of older fish, like this Asian sheepshead wrasse in the China Sea.

海洋健康个征兆就是较老鱼存在，譬如说这只在中国海亚洲羊头濑鱼。

So the cleaner wrasse swims around a fish's body, feeding on parasites found on the fish's scales and even around its mouth.

清洁鱼在鱼身体周围游动，以鱼鳞上甚至嘴边寄生虫为食。