Holacanthus is a genus of marine angelfishes (family Pomacanthidae). This species has a diet typical of angelfishes. Genicanthus is a genus of marine angelfishes in the family Pomacanthidae. Apolemichthys is a genus of marine angelfishes in the family Pomacanthidae. Chaetodontoplus is a genus of marine angelfishes in the family Pomacanthidae. Blue ring angelfishes are frequently encountered in pairs. The queen angelfish may harass other fish, particularly similar sized angelfishes. Many species of marine angelfishes have streamer-like extensions of the soft dorsal and anal fins.