I like the idea. However I feel the scene is too cluttered. I don't think all those bushes were necessary. Simplifying this photo would have had a better effect.
Noise in the background is a problem.
This type of shot didn't need to be taken IN the tank. Having Art as he is, with the rock to one side, a plant to the other and two fishes would have given us the same impression, without the clutter, and scored better. Taking it outsside the tank would also make the lighting and PP easier, and the noise would have been easily avoided.
Bwaaahhahahaaaaahhhhaahaaa!!! LOVE this shot, very funny and well done, kudos on not getting glare off of aquarium! Great attention to detail, love the homemade props, all that's missing are some real fish nibbling at Art but oh well, you got that whatsitsname character from Finding Nemo. 9
No! Not the camera, too!!! Quite the crowded aquarium, there. I think this idea might work better with a little less clutter, and/or a more homogenous background colorwise.