摘要
Of all the 3)formations in the Pacific, these reefs are by far the richest in life. There are hundreds of different kinds of coral. And all are made up of millions of tiny creatures called 4)polyps, each covered in a hard 5)skeleton. Reefs are home to thousands of specialists like these 6)razorfish that 7)blend in to the 8)staghorn coral around them. But not all animals here need to blend in. Grey reef sharks-the reef's top 9)predators.
