Why Are Hippos So Aggressive?

Hippos are intensely territorial and dominant animals. Male hippos will, as early as seven years old, start to learn and display aggressive shows of behavior. They are well known for opening their mouths wide and showing off their massive tusks and teeth to deter predators or invaders. Yes, hippos do have a general dislike towards humans. And lions. And hyenas. And pretty much any other wild animal that intrudes on their territory. According to an estimate quoted by the BBC, approximately 500 people lose their lives every year to hippo attacks in Africa.