sipunculid

例句：

1. 1. The sea anemone is a fascinating creature that can change color and shape.
   海葵是一种令人着迷的生物，它可以改变颜色和形状。
2. 2.The hydrozoan has a unique ability to filter out harmful substances from the water.
   水母具有独特的能力，可以从水中过滤掉有害的物质。
3. 3. Sea anemones are commonly found in coral reefs and are important for maintaining the ecosystem's balance.
   海葵通常在珊瑚礁中被发现，对维持生态系统的平衡至关重要。