Recently added an emporer angel and its been in my tank for 4 days. Nothing has picked on it, but it is staying in the back of the tank and rarely comes out from the rockwork. Fish has not eaten that I've seen and when it does come out it seems to be right before the lights go out. LFS said it was from Bali and I wonder if a fish could have jet lag. Tried feeding frozen Formula One, Formula Two, Prime Reef Flake food, Mysid Shrimp, Omega One Flake, and Nori. I fear how long he can go without eating. Tank has been set up for over 4yrs and everything is good. Any suggestions?