Pentapus

例句：

1. 1.Pentapus is a marine mammal that lives in the Arctic Ocean.
   海豹是一种生活在北极海域的海洋哺乳动物。
2. 2.The pentapus has a unique shape and coloration.
   这种海豹有着独特的形状和颜色。
3. 3. Pentapus is an important food source for many species of fish.
   海豹是许多鱼类的重要食物来源。