After the elephant, the hippotamus is the largest land mammal and the heaviest extant artiodactyl, despite being considerably shorter than the giraffe.
Despite its stocky shape and short legs, it can easily outrun a human.
Hippos have been clocked at 30 km/h (19 mph) over short distances. The hippopotamus is one of the most aggressive creatures in the world and is often regarded as one of the most dangerous animals in Africa.
During the day they remain cool by staying in the water or mud; reproduction and childbirth both occur in water.