Damselfish

( Chrysiptera cyanea ): Stunningly bright blue, but males are notoriously feisty and fiercely defend established territories.

These require larger tanks (75+ gallons) and assertive tank mates that can hold their own. damselfish

( Chrysiptera hemicyanea ): Vibrant blue with a yellow belly, hardy and relatively easy to socialize. The "Conditional" Damsels (Semi-Aggressive) ( Chrysiptera cyanea ): Stunningly bright blue, but