New fish from good LFS 48 hours ago. Seemed fine yesterday, today stayed hidden, didn't eat this evening but ate a little this morning. Not in QT- long story. He was added with a few other non-aggressive fish. I looked for him for a long time tonight, then he finally came out enough to lay against the rock a little for about 5 minutes. As if he was asking for help. Took a few pics then he's back to hidden. I just spent a couple hours looking at common fish diseases. This doesn't look like anything I read about. Is this an injury?New to reefing. No corals to sting. I do have a foxface but he's pretty calm. Please help.