I got a christmas wrasse at the AG the other day (monday). They were telling me that the fish likes to sleep in the sand at night and I thought that was interesting. I havent been home since Monday when he went in, and I havent seen him in a few hours. Its a big fish (like 4-5 inches), and its not in the overflow, sump, and its not in the canopy I dont think. Do they sleep in the sand during the day?