My midas blenny fell out of a rock that i had out of the tank and fell onto the garage floor, then my husband sorta kicked him across the floor (didn't see him) He looked real dark and near death when we put him back in the tank. We turned off the lights and he sat in the corner of the tank like your watchmen was doing. That was afew months ago, he was back to normal in afew hrs. What happened, did the rock cave in on him?