Goldfish Aquarium OS X

Who doesn't love artificial fish living inside your computer that you never have to remember to feed? Prolific Publishing Inc., the people behind my virtual fishtank of choice,
Marine Aquarium, have recently released Goldfish Aquarium for all you goldfish afficianados.  Runs on OS X, and there is a free demo available for download.

I really can't wait until someone combines these with the motion sensors in the newest Powerbooks, so I can shake the tank! Note to the creators of the Sims:  earthquake mode!

UPDATE: As one reader pointed out, the above link doesn't take you to the OS X downloadable demo. 
Here's the link for that. Sorry.