pentodont

例句：

1. 1. The pentodont fish is a species of marine fish found in the ocean.
   齿骨鱼是一种海洋鱼类，生活在海洋中。
2. 2. Pentodonts are known for their unique teeth that can be used to communicate with each other.
   齿骨鱼以其独特的牙齿而闻名，可以用来与其他动物进行交流。
3. 3.In ancient times, pentodonts were used as tools for hunting and gathering.
   在古代，齿骨鱼被用作狩猎和采集的工具。