The Damselfish, also known as the Half-blue Damselfish, is a two-tone, darting marine fish. The front portion of the body is bright blue. The posterior portion, anal fin, and tail are yellow. There is a species variation in the amount of yellow on the body of the fish. (Some call C. parasema the Azure Damselfish, however, in the aquarium trade, the Azure Damselfish is considered to be this fish, C. hemicyanea.) QUICK FACTS: Scientific Name: Chrysiptera hemicyanea Minimum Tank Size: 30 gallons Care Level: Easy Temperament: Semi-aggressive Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025 Max. Size: 2¾" Color Form: Blue, Yellow Diet: Omnivore Origin: Eastern Asia Family: Pomacentridae Images used on this site are for informational purposes only, for actual photos of livestock please contact us (877) 809-4067.