Question

why do hippopotamus had thick layer​

Answer 1

HIPPOPOTAMUS

Hippo skin is two inches thick! ... During the day hippos hang out together in the water or cover up in mud to keep their skin from drying out and cracking. They also secrete an oily red liquid as an additional protection from the sun, giving rise to the myth that hippos sweat blood.

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Answer 2

The rhino’s thick skin protects it from sharp grass and thorns. The skin, which can be 1 ½ centimeters thick and hangs in folds on the rhino’s body, takes on the appearance of armor and protects the rhino from serious injury.

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