The projection is done on the "glass" right there and the normal fish (that are in the tank and real) just swim by. The way they make Nemo and friends apper to be deeper in the tank is just the animation. It is a really neat thing to see. I can't wait till they do it here at DL on the subs, but I do have to say it was a 100 times better then I expected it to be.
J
J