From Unique 3D Screensavers:
For the environmentally minded, 3D Sea Turtles shows turtles swimming amid coral, tropical fish, and sea plants with realistic motion. Animated images are 3D-modeled animated GIFs. The software contains sound files of actual turtle calls, and the background is coral and sea caves with individual coral collections showing in the foreground. Sound can be muted in the full version, and password protection is available. The program is also available as part of a large ocean set at significantly reduced per-screensaver prices.