gambusia

例句：

1. 1. The gambusia is a rare species of fish found in the Pacific Ocean.
   这种鱼是太平洋海域的稀有鱼类。
2. 2. The gambusia has a unique coloration that makes it stand out from other fish.
   这种鱼有独特的颜色，使它与其他鱼类区分开来。
3. 3. The gambusia plays an important role in maintaining the balance of the ecosystem.
   这种鱼在维持生态系统平衡方面起着重要作用。