Domino Damsel - (No Online Purchases)

 Domino Damsel - (No Online Purchases)

The Domino Damsel (Dascyllus trimaculatus), also known as the Three-Spot Dascyllus, is a hardy and popular—though notoriously feisty—staple of the saltwater aquarium world.

Key Characteristics
Appearance: They are famous for their jet-black bodies and three distinct white spots (one on the forehead and one on each side).

The "Fading" Trick: As they mature, their stark black-and-white contrast often fades. Adults can become a duller grey or charcoal color, and their spots may disappear entirely.

Size: They stay relatively small, usually topping out at around 10–13 cm (4–5 inches).

Temperament: Small Fish, Big Attitude
If there were a "tough guy" award for small reef fish, the Domino Damsel would be a top contender.

Juveniles: Often peaceful and even commensal with sea anemones (similar to Clownfish).

Adults: Extremely territorial. They are known to harass fish much larger than themselves and will even "attack" a human hand if it enters their perceived territory during tank maintenance.

Feature Requirement 
Minimum Tank Size:       115 Litres 
Care Level:                       Easy / Beginner
Reef Compatible:            Yes 
Diet:                                 Omnivore (Flakes, pellets, frozen mysis/brine shrimp)
Water Temp:                     22°C – 28°C

Pro-Tips for Hobbyists
Add Them Last: Because they are so territorial, it is best to add them to an aquarium after more peaceful fish have already established their spots.

Rockwork is Key: Provide plenty of caves and crevices. This allows the Damsel to claim a specific "home" rather than trying to claim the entire tank.

The Anemone Connection: In the wild, juveniles often hide among the stinging tentacles of anemones like the Carpet Anemone (Stichodactyla). If you have a reef tank, watching this symbiotic behaviour is fascinating.