Hippos don’t technically swim, they propel themselves through the water using their back legs.
Their running speed varies from 18 mph to 30 mph.
The Greek translation of hippopotamus is “river horse.” The high level of body fat in hippos likely makes swimming fairly effortless for them. They are so large that they can usually walk in or stand in water rather than having to expend energy to swim. Hippos spend up to 16 hours a day in water and can hold their breath for up to 5 minutes.
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