Another reason is that hippopotamus is really a wonderful flower in the animal kingdom, and it is particularly lazy. It can be said that there is nothing like a hippo except sloths. He naturally likes to stay in the water, because if he is exposed to the air for a long time, the water in his body will increase rapidly, leading to dehydration. So, if there is nothing, the hippo is still in the water and will only take two steps when looking for food.
Another point is that hippos can't eat as much as horses can. Although both people are called horses, hippos can eat 100 kilograms of food a day. Moreover, there is another feature, that is, we know that we eat green plants mainly to get the cellulose in them to ensure the normal operation of our human body, but hippos are the overlord in the world of herbivores. Plants eaten by others can be directly digested and decomposed into polysaccharides, and then sugar can be converted into fat.
Eat more and exercise less, so hippos are so fat, but hippos are so fat to protect themselves. You know hippos mainly live in Africa, where there are many carnivores, especially crocodiles in the river. Because hippopotamus is particularly fat and its skin is particularly rough, it is difficult for crocodiles to break through its defense, which can ensure that hippopotamus has the upper hand when fighting crocodiles in the water. Once on land, hippopotamus's bloated figure will become a burden to him, and many flexible animals will attack hippopotamus. They are exhausted and finally eaten, so hippos are not invincible.