Hippos are mammals by classification, and they share some key characteristics with other mammals, such as hippos have lungs and breathe with them.This makes it impossible for hippos to breathe in water, which can lead to drowning.Some people think that hippos breathe in the water because they can stay in the water for a long time, but in fact, hippos breathe with their heads out of the water, at least their nostrils out of the water, which is the case when hippos are in deep water, otherwise they can't breathe.
Sometimes a hippopotamus will dive into deeper water and completely submerge its body.Hippos don't breathe in the water, their ears and nostrils close like valves.However, hippos can not remain in this state for too long, generally every 3-5 minutes they have to breathe once, before they can re-submerge into the water.
Hippos can freely carry out various activities in the water, and sleeping can also be carried out in the water.Hippos often live in the shallow waters of the freshwater basin and generally sleep in the shallow waters.When hippos sleep, their heads are above the surface of the water, or at least their nostrils are above the surface of the water, so that hippos can breathe freely at any time without worrying about breathing.In fact, hippos often sleep in the water, and often rest in the water during the day.
。