After a bit of thought, and goofing off on the internet, I decided I want this little guy...

I want to put him on my desk at work and call him Ryuk.
He's a betta fish. They're small, easy to take care of, and you can put a plant (with white roots) on top of the bowl/tank and make it even prettier. But I found the tank I want, too, and it doesn't have a spot for the plant on top. (view this site to find out more about making your own betta fish vase.)
But I can't have this little guy at work. So I want him at home. Or something equally cute. Or fun. Or something.