QuickCheck: Can hippopotamuses be found swimming in the sea?

Hippos are well known for being aquatic, but will you find a hippo swimming in the sea?

HIPPOPOTAMUSES are among the largest and heaviest land mammals, falling just behind the elephants.

Despite its weight and short legs, a hippopotamus can run up to 30 km/h over short distances, and they inhabit rivers, lakes, and mangrove swamps. Based on what we see in documentaries and even in the zoo, these creatures usually prefer to stay in freshwater areas or even the mud to keep themselves cool.