bathyal fauna

例句：

1. 1. The study of the bathyal fauna is crucial for understanding the biodiversity of the deep sea.
   研究深海生物群落对于了解深海的生物多样性至关重要。
2. 2. The discovery of a new species in the bathyal fauna has sparked excitement among marine biologists.
   在深海生物群落中发现一种新的物种，引起了海洋生物学家们的兴奋。
3. 3. The bathyal fauna plays a vital role in maintaining the balance of the ocean ecosystem.
   深海生物群落对维持海洋生态系统的平衡起着至关重要的作用。