Considering the massive size it’s no surprise that the hippopotamus comes in near the top of this list. Ranging in weight between 3,000 to 8,000 pounds, the third-largest land mammal can grow up to 14 feet long and lives for 40 years. They are capable of opening their impressive jaws 150 to 180 degrees and generating 1,800 PSI of biting force. Given their high aggression and extremely territorial nature, it is rumored that hippos can bite a crocodile in half.

Source: Animals A - Z