The Yellowtail Demoiselle makes a gorgeous addition to any aquarium that captivates any onlookers. It is extremely hardy and is considered very good choice for any beginner aquarist and experts as well. Unlike its close relatives, the Yellowtail Demoiselle is relatively less aggressive in nature and acclimatizes quite easily in captivity. It is best to keep the Yellowtail Demoiselle in small groups and should be introduced at the same time to avoid any aggression between them. It might be harassed by other damsels and other aggressive tank mates, and should not be combined with these species. The Yellowtail Demoiselle requires plenty of hiding places so that the fish can take refuge on it if harassed by the tankmates. Because, it doesn?t bother any corals, it is considered an excellent reef safe fish. The Yellowtail Demoiselle should be fed with frozen, live, flake seafoods, at least twice a day. It grows up to 3 inches in length, and thrives well in a temperature range of 74-79 degree Fahrenheit and pH of 8.1-8.3.