The Speckled Butterflyfish, Chaetodon citrinellus, is also known as the Citron Butterfly, Lemon Butterfly, Speckled Coralfish, and Speckled Butterfly. It features a sleek pearl-white body with scattered blue spots, a black eye band, and a yellow-tinged dorsal and tail fin. Mostly nocturnal, the Speckled Butterfly is best kept in mated pairs or small groups - though larger groups need to be kept in larger tanks. If a mated pair is kept, they should be introduced to the tank at the same time to avoid territorial aggression.