Yeah, that was the best pic I could get of the guy. He wouldn't hold still. Hes' not showing any strange signs or anything. I just noticed it last night.
I have had him for a month. I added a watchman goby the other day. But they stay on opposite sides of the tank. Would another angelfish be messing with him?
Yes, angels frequently don't get along. What other angel do you have with it?
I'd watch for aggression - just observe from a short distance way - where they don't notice you watching them, and see how they behave toward one another.
+1 to what jenn said, chances are more than likely the other angel is stressing him. Out of all of the fish I have owned pygmy angels seem to be quite mean sometimes.