I added a new Melanarus wrasse and a yellow Corris to my tank 1 week ago. I thought they had died since I have not seen either of them since. This morning I saw the melanrus his head was buried but the rest of his body was exposed. I thought he was dead and turned around retrieve my tongs. When I turned back around he was gone. Looks like he re buried himself fully. It’s been a week. How long can they stay buried? I know where he is should I uncover him or leave him be. As far as I know neither wrasse has come out a swam around since added..at least not that I have witnessed. I do have a couple of other wrasses. 1 mystery wrasse, 1 flasher fairy added when the Melanarus and yellow corris were added and a large checkerboard wrasse. I have had the checkerboard for years and he has lived with a Melanarus in the past without issue. The tank is 240 gallons.