Despite its calm appearance, it is best not to rub a hippo. Even crocodiles are wary of  this mastodon of 3 tons, with awesome canines. This semi-aquatic animal lives along the rivers of Africa and spends its days immersed in the water to fight against the heat. It is only at nightfall that he reaches the mainland to feed on fresh grass (up to 88 pounds per day). The Hippopotamus is easily recognizable! He has a massive figure, small ears, short legs and a huge mouth with impressive teeth. Hippopotamuses live in groups of about fifteen individuals respecting a strict hierarchy.