The Fiji Devil Damsel (Chrysiptera taupou) has a mostly blue body with yellow on the underside that begins near the mouth and runs into the tail. Some of the blue scales on the body are white tipped. The dorsal fin has a yellow edge.
Damsels and chromis both come from the Pomacentridae family, which they share with Clownfish, a close relative and another very popular group of aquarium fish. Their temperament can range from very peaceful to quite aggressive and territorial. Chromis (fish from the genus Chromis) tend to be more peaceful than the rest but can also be more delicate. Other common genuses of damsels include Amblyglyphidodon, Chrysiptera, Dascyllus, Neoglyphidodon, Pomacentrus, Stegastes and others.
These fish are generally not picky eaters. In the aquarium, they will usually feed on flakes and pellets but should also be given fresh or frozen algae and meaty foods like brine shrimp, mysis shrimp, planktons, krill, shrimp, scallop and similar items.
Damsels can become very territorial as they become established in the aquarium. Some species will defend their territory especially aggressively; use caution when stocking the aquarium since their small sizes can be deceiving; mature or established damsels may pick on smaller or weaker fish or on new arrivals. Some damsels retain the same appearance throughout their entire lives while others undergo a radical color change as they mature from juveniles to adults. A few may get more colorful as adults but most change from very colorful juveniles to bland, more subdued adults.
I have one housed with no other damsels, It keeps to itself and was actually terrorized by a domino that was removed because it was a menace. I dont know if I have ever had a more peaceful damsel than the fiji blue. I'm just wondering if it will get large and turn black like some of the others. It doesn't seem to have grown much in the last 6 months so hopefully it won't. I give a a 5 for a damsel, it is pretty and behaves. It is a little annoying that it seems to be everyones favorite rather than the $100+ fish that it is housed with.