Hippopotamus

Hippopotamuses (Hippopotamus amphibius) are water-loving, big, round mammals endemic to Africa. Although "hippopotamus" comes from the Greek word for "water horse" or "river horse", hippos and horses are not closely related. According to the African Wildlife Foundation, common hippos, sometimes known as river hippos, are the third-largest living land mammals after elephants and white rhinos. They can reach a length of 10.8 to 16.5 feet (3.3 to 5 meters) and a height of 5.2 feet (1.6 meters) at the shoulder.

The hippopotamus is also one of the heaviest animals in the world. Males weigh 3,500 to 9,920 pounds (1.6 tons to 4.5 tons) while females weigh around 3,000 pounds (1.4 tons). At that height, it’s easy for hippos to tip over boats in the water or crush a bothersome human. It's also worth noting that a set of bone-crushing teeth should not be underestimated.

Weight: 4.5 tons