水生动物

例句：

1. 1. The fish swim in the ocean.
   鱼在海里游。
2. 2. The coral is aquatic plants that live in shallow water.
   珊瑚是生活在浅水中的有生命的植物。
3. 3. Many animals are aquatic creatures that need to stay in water for survival.
   许多动物是水生生物，需要在水中生存。