Damselfish -

( Chrysiptera parasema ): Striking electric blue with a yellow tail; one of the least aggressive standard damsels.

Avoid these in standard community reefs. They often start out adorable as juveniles but turn into absolute terrors as adults.

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

Not all damselfish are created equal. They generally fall into three behavioral categories: The "Good" Damsels (Manageable Aggression)

These require larger tanks (75+ gallons) and assertive tank mates that can hold their own. ( Chrysiptera parasema ): Striking electric blue with

( Chromis viridis ): Peaceful open-water swimmers that do best in schools of 6 or more.

( Dascyllus species): Hardy and active, but known to dominate rock formations aggressively as they mature. The "Avoid" List (Highly Aggressive) ( Chrysiptera hemicyanea ): Vibrant blue with a

These species are generally peaceful or have manageable territories, making them the best choices for mixed community reef tanks.