There is the pianist. There is the fisherman. Then there is the guy with a lot of time who enjoys making pianos into aquariums which is totally awesome. He started with a television and then got the idea for a piano aquarium. So he hollowed out an old piano, wired up everything including the filter, lights, pumps, and heaters and then put it all back to look like a piano.
And get this, he plans on making the piano playable again.