Ключевые слова: africa, african, aggression, aggressive, animal, attack, battle, behaviour, big, bite, conservation, danger, dangerous, defence, defending, display, displaying, fight, game, hippo, hippopotamus, hippopotamus amphibius, horizontal, huge, jaws, large, mammal, nile, power, protected, reserve, roar, safari, safari animals, splash, splashing, submerged, swim, territorial, territory, tooth, vicious, water, wild, wildlife, yawn,