Damselfish

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

( Dascyllus species): Hardy and active, but known to dominate rock formations aggressively as they mature. The "Avoid" List (Highly Aggressive) damselfish

( Chrysiptera talboti ): Soft purple/yellow tones and highly recommended for smaller community tanks due to its mellow nature. ( Chrysiptera cyanea ): Stunningly bright blue, but

( Dascyllus trimaculatus ): Cute black fish with white spots that grow large and become incredibly pugnacious. ( Dascyllus trimaculatus ): Cute black fish with

While exceptionally resilient, they should never be subjected to poor conditions. Damselfish Care | Tropical Fish Hobbyist Magazine

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

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