Originally posted by PigsOnTheWing
The "widescreen" fish chosen from the pop-up menu will only come into play when you've got a 16:9 widescreen Aquarium on your screen.
Jay
To see the "widescreen," run the application and drag the bottom right corner of the window to the right, so the window is longer than it is tall. This might not be apparent to new users. It took me a while to figure it out.
-Iesposta