I've had this yellow banded possum wrasse for over 1.5 yrs. I had him in a smaller tank 24x20x20 the entire time. I never really saw the fish much. It just sort of hung out in the rocks and only came out to eat. @i cant think stated he thought maybe I wasn't watching the tank enough to see the fishes true personality. That got me to think about things and I decided maybe the tank wasn't really laid out for the fish. Rock work was limited and a large blue haddoni occupies a large amount of space. I decided to move the wrasse out to my 7ft tank half expecting to never see it again. The video shows him the day after being added. I thought he was dying but noticed small movements backhand forth. It made me think of a possum when they play dead. My dog caught one a week ago and they do in fact play dead. The dog was no longer interested and the possum walked off later. So I guess this is my long winded way of asking are they called possum wrasse because they play possum? Is this normal behavior? The next day I found the rock he has chosen to hang out under and the fish looks fine.