Hippo is a semi aquatic mammal of the Hippophae family in the order Artiodactyla. Hippo is the largest omnivorous mammal in freshwater, with a huge body and short limbs A thick and sturdy head The mouth is large and can be opened at a 90 degree angle The front teeth and canine teeth of the hippopotamus are both in the shape of fangs, and the lower front teeth extend parallel to the front like shovels The eyes, nostrils, earshells, etc. of hippopotamus are all located at the upper end of the face, almost on the same plane The hippopotamus has thick skin, appearing black brown and reddish purple, smooth and hairless, with only some hair on the tip of the mouth, inner ear, and tail.Hippos are mainly distributed in tropical regions of Africa, inhabiting swamps and reeds near rivers.

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