Hippopotamuses are protected by their immense heads, and are capable of defending their young from crocodiles even when in the water.
"The Human Side of Animals"
Royal Dixon
Seals seem never to tire of chasing one another through the water; while even the clumsy Hippopotamuses have diving games.
"The Human Side of Animals"
Royal Dixon
You shall obey me, or I will take Baby Paul and feed him to the Hippopotamuses-no, they eat hay and carrots and things; but I will throw him to the bears in the pit or squeeze him through the bars of the lion's cage.
"A Top-Floor Idyl"
George van Schaick