The Flameback Dwarf Angel Fish has a dark blue base colour and an orange head, back and dorsal fin. Around the eyes and pelvic, dorsal and anal fin they’ve an electric blue line. This species looks very similar to C. acanthops, but the caudal fin from C. aurantonotus is blue, compared to yellowish-orange in C. acanthops.
Like all other angelfish it's hermphroditic and the most dominant fish will turn into a male when there is no other male around.
These fish are quite peaceful. Although dwarf angels are certainly more likely to be reef safe compared to their larger relatives and thus seen more often in reef tank, they're always a risk. The Flameback Dwarf Angel Fish is considered one of the easier and more reef safe dwarf angels, but even here, individuals are known to harass certain LPS corals. Keeping them well fed seems to reduce the risk, so make sure to feed them a proper varied diet of algae and meaty foods to make them really happy!