Hippopotamus (Hippopotamus amphibius) Hippopotamus common hippopotamus The Big Zoo http://www.thebigzoo.com/Animals/Hippopotamus.asp http://www.thebigzoo.com/Animals/Hippopotamus.asp http://www.thebigzoo.com/Animals/Hippopotamus.asp common hippopotamus Hippopotamus (Hippopotamus amphibius) - theBIGzoo The Big Zoo