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

他是一条裂唇鱼，过着非常忙碌的生活。

Nearby, a humphead wrasse is undergoing a remarkable transformation.

不远处，一只波纹唇鱼正在经历一场非凡的变化。

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

波纹唇鱼改变颜色，失去眼线，快速变大。

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

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，波纹唇鱼可以变换性，们一个时间只能表出一个性。

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

有趣的是，这条正在清洁波纹唇鱼的蓝条纹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，从蓝条纹的清洁鱼到洪堡乌贼，有同性性行为。

Like Allosaurus, the tubelip wrasse is a predator.

像异特龙一样，管唇濑鱼是一种捕食者。

Scientists thought the tubelip wrasse had plain, smooth lips.

科学家们认为管唇濑鱼的嘴唇平坦光滑。

The cleaner wrasse is a small fish.

吸盘鱼是一种小型鱼类。

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。

Of course, if you've seen one elderly Asian sheepshead wrasse, you've seen them all.

当然，如果你见过一只年老的亚洲羊头濑鱼，你就见过所有的了。

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

这些鱼需要这种鱼, 所以们不会故意伤害。

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。

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。

This parasitic turn is only temporary, of course, and the wrasse will quickly return to its usual gourmet grooming.

当然，这种寄生行为只是暂时的，濑鱼很快就会恢复其惯常的美食鱼服务。

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

海洋健康的一个征兆就是较老的鱼的存在，譬如说这只在中国海的亚洲羊头濑鱼。

This enormous fish would never visit Japan if it wasn't for the warmth that bathes the island chain and the helpful services of this resourceful little wrasse.

如果没有温暖的岛屿和这种机敏的小裂唇鱼的有益帮助，这种巨大的鱼永远不会来到日本。

If a wrasse thinks it can get away with it, it will try to take a bite of the fish it's cleaning.

如果濑鱼认为自己能侥幸得逞，就会试图咬一口正在清洁的鱼。

In one  case, other species of small and vulnerable fish, wrasses and blennies joined the crowd, eyes pointed toward the burrow, memorizing the threat.

在一个案例中，其他种类的小型脆弱鱼类、濑鱼和鲳鱼也加入了人群，眼睛盯着洞穴，记住了威胁。