3D Aquarium Fish Screensaver features schools up to 100 Salt-water or Fresh-water fish swimming among bubbles within beautiful Underwater Backgrounds at the same time. Virtual Aquarium Screensaver allows you to choose among 3 beautiful Salt-water Fish Tanks, 3 Fresh-water Aquariums or you can turn them into sea bottom. Underwater Screen Saver displays the Digital clock with time in a 12/24-hour format and calendar.