The Blue Devil damselfish, or Chrysiptera cyanea, is a popular colorful fish that’s ideal for many saltwater tanks. They’re active and unique in their appearance, but they do require some precautions as more aggressive fish.
In this care guide, we’ll go over some aspects of the Blue Devil damselfish to consider before purchasing one or more specimens of this species.
The aggressiveness of the Blue Devil makes it difficult to find suitable tank mates. They’re highly territorial and won’t hesitate to go after other more vulnerable fish. This is why it’s best to keep other fish in the tank that won’t fall victim to the Blue Devil, including other damselfish, dottybacks, and wrasses.
Conversely, you should avoid keeping larger and equally aggressive fish with the Blue Devil, as it’s smaller and may not be able to survive with the wrong tank mates. Some tank mates to avoid include eels, lionfish, triggerfish, and pufferfish.