Hippos do spend a great deal of time in the water since they are vegetarians and graze the water plants. The water gives them buoyancy, keeps them cool and helps prevent parasites and other skin irritants. Incidentally their flippers have all the bones that we have in our hands.
Mostly to keep cool and to protect its surprisingly delicate skin from sunburn and insect attack. It also makes for a luxurious life for a very heavy animal.
to stay cool
By staying in the water, hippos stay cooler. Also, it helps to protect them from sun burn. They emerge from the river at night, when it is cool, to eat grasses.
A hippopotamus will eat at least 150 pounds of grass each night and they manly stay under water most of the time.
diurnal i saw one during the day in Africa once
They can, but they stay in water during the day to avoid sun burn
If you want to stay healthy 2 litres is the minimum per day which includes Mineral Water
no, because you need to stay hydrated during the day.
hippopotamus
They do not. They only stay under water during the day, because that is when they rest. They come out during the night.
They stay in the water all day long keeping themselves cool. During the evenings, they come out and go in search of grass to eat.
nocturnal
The hippopotamus is the third-largest land mammal on earth. It is an herbivore and also drinks about 25 liters of water each day.
An ectotherm is an animal whose body temperature depends on external sources. Hippos cannot regulate their own temperature, they live in water during the day and feed at dusk when the temperature is cooler. They are therefore ectotherms