Demospongiae

例句：

1. 1. Demospongiae are fascinating creatures that live in the ocean.
   海绵动物是生活在海洋中的迷人生物。
2. 2.The Demospongiae play a crucial role in maintaining the balance of marine ecosystems.
   海绵动物在维持海洋生态系统平衡中起着关键作用。
3. 3. Recent discoveries have revealed that some Demospongiae can even produce their own food.
   最近的研究揭示了一些海绵动物甚至可以自给自足地产生食物。