pelagium

例句：

1. 1.The pelagium is vast and teeming with life.
   海洋广阔，生机勃勃。
2. 2.The pelagium is home to many marine species.
   海洋是许多海洋物种的家园。
3. 3. The pelagium is a source of food for many marine creatures.
   海洋是许多海洋生物的食物来源。