my roomie just got the new windows xp final version and the aqarium screen saver rocks!! has a trigger, blue tang and other fish. 3 trimax clams, frogspawn and other goodies!! it rules. and it moves in 3d like a smooth video!!!
I am running the release version of Windows XP corporate and there is no aquarium screen saver. It's probably because it's the corporate edition. The one from serenescreen.com is pretty cool.
I just came accross this one today.
It's still in beta form, and it looks like it needs some work, but when it runs if your connected to the web it trades fish with other people online, creating your virtual aquarium. You can click on the fish to see where it's been.http://www.daliworld.net/index2.html