The 3D Sea Aquarium screensaver is a true 3D experience. Tickle the fish, feed the fish, set the lighting to change automatically. You get four extremely realistic scenes and 10 tropical fish which swim under the surface water which ripples as the light that shines through. This is one of the most realistic aquarium screensavers ever developed. Unlike most screen savers, this is also a true 3D screensaver.