This is where parrotfish come in.

这就是鹦鹉鱼上场时刻了。

Can you guess what parrotfish and beaches have to do with each other?

你能猜到鹦嘴鱼和沙滩有何必然干系吗？

Eating rocks is just one way parrotfish help manage seaweed.

吃石头只是鹦鹉鱼打理藻一种方式。

But unlike their neighbors, parrotfish can completely remove even the tiniest scraps of seaweed from the ocean floor.

但它和它邻居不一样是，鹦鹉鱼能够从床上完全藻，甚至是其最小残渣。

The parrotfish that remain live in much smaller communities.

幸存鹦鹉鱼只得生活在更小群落里。

Through a dynamic system of social networks, parrotfish can convey information to other coral-dwelling fish.

通过一个动态社交网，鹦鹉鱼能向其他珊瑚居民传递信息。

Then the parrotfish has to get rid of all of the crushed limestone—and there's only one way to do that.

然后鹦嘴鱼要处理掉所有碎石灰石，而它们只有一种处理方式。

Named for their vibrant scales and beak-like teeth, these parrotfish are devouring a particularly crunchy breakfast: rocks.

以他们鲜明鳞片与喙状齿闻名，这群鹦鹉鱼在忙着吃一种特别脆早餐：石头。

Parrotfish are a distinctive family of fish species with a tough, bony beak so strong that they can bite through rock and coral!

鹦嘴鱼是一类独特硬骨鱼，骨喙强度足以它们咬碎岩石和珊瑚。

In many coral reefs, overfishing has reduced the number of parrotfish, as well as other seaweed eaters, such as surgeonfish and rabbitfish.

很多珊瑚礁中，过度捕捞减少了鹦鹉鱼数量，以及其他吃藻鱼，例如，刺尾鱼和蓝子鱼。

This helps parrotfish reach seaweed other fish can't consume, while simultaneously clearing out open space for new corals to settle and existing colonies to expand.

这帮助鹦鹉鱼吃到其他鱼够不到藻，还能为新珊瑚清扫出开放生长空间，帮助新珊瑚定居，让原有珊瑚生长。