Manatees (as challenged by @ceilster)
What's not to love about them?
They are big and round, have fuzzy whiskers, and chubby smiles. They appear, for all the world, like giant grey marshmallows. If that analogy fails you, try this one. Someone built a barrage balloon under water and gave it flippers... That is where manatees come from.
I guess I should give some kind of disclaimer that manatees can be dangerous, but to be honest, I think this is a tad redundant. Of course this fuzzy faced beast can be dangerous. All of nature can be dangerous. You just need to know that there can be consequences for messing with things.
Okay, enough of the disclaimer. Back to the bloated cow of the sea, that superb swimming blimp, the tumefied water-acrobat, the distended submarine, the intumenscent hot water bottle, the elephant who learned to swim. (I think I broke thesaurus.com)
They are funny, somewhat blubbery, and wonderfully themselves. We could all take a lesson from the Manatee: "You are the shape you have been made, and you are special just the way you are."