Spurred by the fact that there are only 200 three clawed sloths left in the world (very sadly this is probably due to the fact that they are too lazy to get down and dirty) my friend sent me this very cute video from the sloth orphanage. It's the cutest video ever!
And on wikepedia it says they are actually competent swimmers! By the looks of it they are competent - but so slow they don't go anywhere...esp if there's a current. Take a look: