Ok, So I have had my duncans for about 6 months now, and we recently changed to a different tank. When we changed, i had to move the duncans and they kept getting knocked off the rocks by assorted fish (d@mn clowns!) I have finally gotten them somewhere where they aren't bothered but they aren't coming out at all. I see no tissue recession and they are still healthy looking, they just don't come out at all anymore... anyone have any ideas as to why?