I’ve had my lineatus wrasse for about a week now and today I came home to find him laying where my sand and rock meet. This is common at night as it’s his typical sleeping behavior for me, but never during the daytime, not even when I first added him. He has been great before this, very active and always hungry. Now he has not moved until I put the net in which got him up and swimming normally for about 2 minutes before he returned to the same spot. Any ideas as to what could be wrong?