Hippos will only eat about 1 percent of their body weight in a single evening, which is a very low percentage for such a large animal.
The hippo does not sweat, but is secreting a reddish substance that protects its skin from sunburn and keeps it moist.
A hippo’s hide alone can weigh half a ton.
The name hippopotamus comes from the Greek words ’hippos,’ meaning horse, and ’potamus,’ meaning river. But hippos are not related to horses at all – they are more closely related to pigs.