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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.)
A 30 gallon aquarium or larger with plenty of rockwork and décor is ideal. Because it can tolerate substandard water parameters, it is a popular fish among beginning hobbyists. A small group of juvenile Azure Damsels will add color and drama to most marine aquariums. Maintain this species with other semi-aggressive fish, as they can become territorial as they mature. In larger reef aquariums, this is normally not a problem if plenty of hiding places are provided.
The Azure Damselfish diet should consist of quality flake foods, frozen meaty foods such as brine or mysis shrimp and occasionally dried seaweed offered on a feeding clip.