ok...holdup, need a little info on your tank.
first of all, how big is your tank, how long has it been set up, what substrate are you using, whayt else is in the tank (inclusing clean up crew)?????
i personally wouldnt worry about it too much, especially if it means disturbing a sand bed(since you have a UGF, i am assuming you are a CC user). the fish will get consumed in the tank. Damsels are sometimes considered pests anyway, so this might be a good thing as they are next to impossible to catch.
dont tear anything down just yet (other than the PH to make sure its body is not jarred up in there. is there a screen on it?), you may do more harm to your tank getting him out than it being in there.