Question

Why are pinnipeds, cetaceans, and sirenians found only in the ocean?

Answer 1

$\huge\mathfrak{Answer}$

These carnivores use flippers to move both on land and in the water. Pinnipeds spend the majority of their lives swimming and eating in water and come onto land or ice floes to bear their young, rest, and molt. Like cetaceans, sirenians also spend their whole lives in water.