A personal fave of mine in the animal kingdom has always been otters for who doesn't love to watch the charming little critters play and play and play?
Well, I simply had to post this HuffPo link so you will be certain not to miss this collection of otter photos. Especially check out the first image of Ol Stink Eye - it's hilarious!
And from a Dreamyfish Art post of August 2008, here's a National Geographic video of a playful otter tangling with a pufferfish which defended itself quite well, thank you.
Guess it's live and learn, even for an otter!