platycrania

例句：

1. 1.The platycrania are a group of fish that live in the ocean.
   多鳍鱼纲是一种生活在海洋中的鱼类。
2. 2.The platycrania are known for their unique features and behaviors.
   多鳍鱼纲以其独特的特征和行为而闻名。
3. 3.The platycrania play an important role in the ecosystem.
   多鳍鱼纲在生态系统中起着重要的作用。