The hippopotamus is like a giant, chunky water balloon that decided to take a stroll on land. It often looks like a really grumpy, oversized potato with legs, sporting a mouth that could fit your entire arm in it. With skin that’s more like an old tire than smooth leather, this hefty creature spends most of its time lounging in muddy puddles, occasionally surfacing to snort like a sea cow who forgot how to swim. When it gets mad, it’s like a moving boulder that huffs and puffs a lot, making it the surprising diva of the riverbanks.