hippopotamuses fighting

adult africa african aggressive amphibius angry animal big brown bull canines closeup common conservation creature dangerous east ecology endangered enormous environment exotic fauna fierce fight fighting gaping giant habitat herbivore hippo hippopotami hippopotamus hippopotamuses history hostile huge impressive incisors ivory kenya kenyan large male mammal massive mouth natural nature outdoors pink pool power powerful reserve risk river roar roaring safari south species stream striking strong sunny sunshine tanzania teeth tourism travel ungulate unique upset vegetarian water wet wild wilderness wildlife