The parrotfish that remain live in much smaller communities.

幸存的鹦鹉鱼只得生活在更小的群落里。

This is where parrotfish come in.

这就是鹦鹉鱼上场的时刻了。

You hear the sound of the parrotfish, like the noise of the waves.

你可以听到鹦鹉鱼的声音，就像海浪似的。

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的干系吗？

There is nobody talking. You hear the sound of the parrotfish, like the noise of the waves.

你在水下。没有人说话。你听到鹦嘴鱼的声音，就像海浪的声音。

Eating rocks is just one way parrotfish help manage seaweed.

吃石头只是鹦鹉鱼打理海藻的一种方式。

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的是，鹦鹉鱼能够从海床上完全移除海藻，甚至是其最小的残渣。

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的石灰石，而它们只有一种处理方式。

The lionfish's menu includes herbivores that eat algae, like parrotfish or surgeonfish.

狮子鱼的食物包括以藻类为食的食草动物，例如鹦嘴鱼和刺尾鱼。