I have a large abt 6" rose bubble tip that was dead center in the tank. I moved a rock in the tank yesterday (not her rock) and once I took my hand out of the tank she had totally retracted in. I could barely see her up under her rock. Now she is nowhere to be seen. Not even a trace. Do they disappear like this and then show back up? She was in a perfect spot, was out all the time, eating, etc. Then poof gone. I'm stressing here!:sad: