Asciiquarium screensaver for Windows
Created by Jean Sommer, contributions by Russell Goring
Kirk Baucom originally wrote the ASCIIQuarium animation in Perl. His website, and the original ASCIIQuarium, with links to other ports can be found here: https://robobunny.com/projects/asciiquarium/html/. There’s also a freshmeat page for the Perl version of the program here: http://freshmeat.sourceforge.net/projects/asciiquarium
J. Sommer took this idea and created a Windows screensaver out of it. This is the source for the Windows version.