Not at all.
Minimum Tank Size: 30 gallons
Care Level: Easy
Tank Conditions: 72-78?F; sg 1.020-1.025; pH 8.1-8.4; dKH 8-12
Max. Size In Aquarium: Up to 3"
Color Form: Bright Blue, Bright Yellow
Temperament: Semi-aggressive
Reef Compatible: Yes
Diet: Omnivore
Origin: Indo-Pacific
Family: Pomacentridae
The Yellowtail Damsel, also known as the Yellowtail Blue Damselfish, Yellowtail Demoiselle, or Azure Damselfish, is bright blue, with a tail of energizing yellow. (Some call C. parasema the Azure Damselfish, however, in the aquarium trade, the Azure Damselfish is considered to be C. hemicyanea.)
The Yellowtail Damsel is a good choice for beginners since it is less aggressive and does not need as large of a tank as many of the other damselfish. It can be kept in small groups, and prefers to have many hiding places and peaceful tank mates. It will ignore invertebrates in the aquarium and feed on zooplankton and algae. A varied diet of meaty items such as mysid shrimp and vitamin-enriched shrimp should be offered.