OceanDive
OceanDive is a unique combination of a 3D marine life screensaver and a scuba diving exploration game. Behold the amazing undersea world of the living ocean! OceanDive takes you on a journey through the eyes of a scuba-diver, showing you stunning sub-marine vistas, shoals of fish, undersea... The exploration game gives YOU the freedom to find out! ... Enjoy the sights of the world beneath the waves that is OceanDive, and you don't even need to bring your scuba gear! ... Always wanted to know what is just around that canyon corner, or just beyond the edge of your visibility?
http://download.oceandive.com/oceandive_setup.exe - 16Mb - Download - Screenshot

Awesome Tropical Reefs Screen Saver
A photo slideshow screen saver with photos of sea life in tropical reefs. Includes fish, coral, starfish, urchins, and more. All photos are 800x600 high-quality images. (1024x768 also available, see our web site. ) Other screen saver features include transition effects, black and white mode,... This Lite version with 5 photos is free, the Gold Edition has 42 photos and may be purchased at Awesome-Screens. ... com.
http://www.awesome-screens.com/zip/tropical_reefs.zip - 1Mb - Download - Screenshot