Download free 3D Aquarium screen saver by J. Lechuga
Aquarium is a free without limitations screen saver featuring a lot of fish that swim gracefully on the screen!
Aquarium lets you select which fish you’d like to appear, in case that you don’t like some of them or that you prefer a less crowded monitor!
Another nice feature is that you can change the background to use gradient, glass and more, even activate a musical tune! Notice that Aquarium will appear on both of your monitors if you use a dual setup.
Aquarium comes as a plain .scr file; you don’t need to install it, just double click to run the screen saver immediately, or right click to configure and / or add it to the rest of your system screen savers.