With no sweat glands, hippos keep cool in the water or in mud. But they do secrete a red fluid that helps them avoid sunburn. While most of its body is underwater, a hippo can hear, see, and breathe, since its eyes, ears, and nostrils are on the top of its head and nose. When completely underwater, its nose and ears close automatically.
Hippos live in herds of 10 to 30. The dominant male can mate will all the females in the herd. If challenged, a male hippopotamus will fight using its long canine tusks. These teeth can grow a foot long.
A hippopotamus is born underwater. The mother helps her baby to the surface to breathe. Hippos bear single young. Calves weigh 55 to 120 pounds and nurse underwater. Mother hippos protect them from lions, leopards, crocodiles and male hippos. Sometimes calves will rest on their mother’s back.
Hippos mature at an average age of 7 (males) to 9 (females) years and have a life expectancy of about 45 years. On top they are brownish gray and underneath pinkish. Hippos have good sight, sense of smell, and hearing.
The name hippopotamus comes from 2 Greek words that mean river horse. These animals are aggressive and not afraid of people.







