Pteropoda

例句：

1. 1. Pteropoda are found in freshwater habitats around the world.
   水生甲壳类动物在世界各地的淡水栖息地中被发现。
2. 2.The pteropoda play an important role in aquatic ecosystems.
   水生甲壳类动物在水生生态系统中起着重要的作用。
3. 3. The pteropoda are known for their unique adaptations to life in water.
   水生甲壳类动物以其独特的适应水生生活的特性而闻名。