The correct answer is Hippopotamus because out of the given options, it is the only animal that matches the description. An eagle is a bird, not an animal. A cat is a domestic animal, but it does not resemble the animal in the picture. An elephant is a large land mammal, but it also does not match the description. A hippopotamus, on the other hand, is a large semi-aquatic mammal with a bulky body, short legs, and a large mouth.