I assume you're referring to a Koran Angelfish (Pomacanthus semicirculatus). They range from the Indian Ocean (and all the way to the Red Sea) to the Indo-Pacific. P.semicirculatus is a bottom dweller that doesn't wander far from the substrate. As I remember, they feed on algae when they're juveniles, but as they mature, they'll consume sponges and corals. Keep in mind they get to about 18" long, so you'll need a monster of a tank to house one. I wouldn't consider them reefsafe, though, like P.asfur, it isn't completely impossible to keep one in a reef; it just depends on how much you're willing to gamble. My recommendation: unless you've got a 180+ galllon tank and don't mind lossing some LPS and soft corals, I'd avoid this species.