What adaptation do hipopotemus have?

Hippos have several adaptations that help them thrive in their aquatic environments. Their large, barrel-shaped bodies and short legs enable them to move efficiently in water, while their skin secretes a natural sunscreen to protect against sunburn. Additionally, hippos have specialized nostrils that close when submerged, allowing them to stay underwater for several minutes while still being able to breathe. Their large mouths and teeth are adapted for grazing on grass, which constitutes much of their diet.