IMO all angels are not 100% surefire reef safe. However, I have had a couple watanabes, a lamarck, and a swallowtail as Lion Crazz mentioned and they did fine in a mixed reef. I currently have a potters angel in a reef, but I would not recommend a potters as they aren't easy to keep in captivity. It nips at a few corals once in a blue moon but no biggie really.