Chaetopoda

例句：

1. 1.Chaetognatha is a type of marine invertebrate that lives in the ocean floor.
   海鞘纲是一种生活在海洋底部的海洋无脊椎动物。
2. 2.The discovery of this species has shed new light on the evolution of marine life.
   这种物种的发现为海洋生物的进化提供了新的见解。
3. 3.Chaetognatha are known for their unique adaptations to survive in extreme environments.
   海鞘纲以其独特的适应能力在极端环境中生存而闻名。