珊瑚虫类

例句：

1. 1. The coral reef is a vital ecosystem that provides habitat for many marine species.
   珊瑚礁是一个关键的生态系统，为许多海洋物种提供了栖息地。
2. 2. The coral reef is home to a diverse range of fish and other marine life.
   珊瑚礁是各种鱼类和其他海洋生物的家园。
3. 3. The coral reef is threatened by pollution and climate change.
   珊瑚礁因污染和气候变化而受到威胁。