Help!!! African Cichlid behind 3D Backround?

Just recently one of my smaller Auratus cichlids got stuck behind my 3d Backround. There are only 2 very tight and small openings which he probably got in through. The fish can travel the whole length of the tank behind there. None of my other fish have ever done this before. I tried a net behind there and used a flashlight but the the net just scared him away. My question is, is there any way to make him come out, and any preventative for the future?

Bill2015-01-21T14:40:28Z

Can you remove the background without harming the fish? You might either take it out permanently, seal the small openings, or make them bigger.