change backgrounds?
 

Is it possible to change the background?

Nope. :)

I'll elaborate a bit on that:

The reason the background isn't interchangeable is that it's just not a flat picture. Jim (Sachs – the creator of the SS Aquarium) has cut it up in several pieces in order for the fish to be able to swim behind some of the coral. Press "w" while it's running to see better how this works. It would certainly be possible to create a second (or more) background(s), but when the Freshwater Aquarium is finished, Jim will resume work on a full 3D background which will be apporimately two times the width of a regular 4:3 monitor/TV, enabling panning of the camera, possibility for fish interacting with the coral and better collision-detection. Also, future creatures like a banded coral shrimp and others will be able to climb the coral and the Percula Clownfish will get a anemone to reside in.

Then again, nothing more than "Nope", huh?

/Tiny Elaboration

That sounds great... let's get going!

;-)