Where do people get the animated fish desktop wallpapers?

[Dizzles]

When I was growing up, I'd go over to all of my friends houses and they would have a desktop background that looked like it was under the ocean and fish would swim by. I use to see them on the display computers in Best-Buy and Circuit City (before it went out of business, of course) but now I'm not able to find it anywhere. I've searched online but haven't found exactly what I'm looking for. all I can find are some very artificial looking ones; they're all sad interpretations of the one I''m talking about. I just figured that they were a thing of th past and nobody made them anymore. Maybe some of you know what I'm talking about.

I'd really like to know where to obtain/purchase an animated fishy wallpaper for my computer.
Thanks in advance.