Algodoo

Kick back and just let this scene run as you watch the goldfish slowly swim around the tank. You can zoom in and see the realistic movements of the vegetation as the plants gently sway with the water currents. There is even a bubbler that airates the water so the fish can breeth. This is a relaxing, tranquil scene that can ease your mind at the end of a hard day at the office (or wherever you go during the day). Enjoy!

UPDATE: Original fish textures were HUGE files. Changed to lower resolution, and now files are smaller.