🐠 Domino Damsel (Dascyllus trimaculatus)
A Jet-Black Juvenile With Three Bright White Spots • Fades to Plain Grey With Maturity • One of the Boldest, Most Territorial Damselfish
 
📋 The Domino Damsel, also known as the Three-Spot Damselfish, is sold as a charming juvenile with a jet-black body and three bright white spots. Adults lose most of this pattern, settling into a plain light-to-dark grey.
It comes from an enormous range spanning the entire Indo-Pacific, from the Red Sea to Hawaii, with juveniles commonly found sheltering in the tentacles of large carpet and magnificent anemones before transitioning to branching coral and rocky outcrops as they mature. Every Domino Damsel we ship is feeding well.
This is one of the boldest, most territorial damselfish in the entire hobby, and a fully grown adult will fearlessly attack fish many times its own size, potentially dominating and terrorising an entire community tank. Juveniles are much more peaceful, so introducing it young, before larger, more established fish are already settled, and pairing it only with robust, assertive tankmates like tangs, larger angelfish, or triggerfish gives the best chance of a workable outcome. It should not be housed with gobies, blennies, firefish, seahorses, or other small, timid species. It's one of the hardiest, most adaptable marine fish available, and fully reef safe toward corals and invertebrates. It reaches up to 13cm, so a 210L tank suits it well.
 
💡 Highlights
🎨 Charming Three-Spot Juvenile Pattern: Fades to plain grey with maturity
⚠️ Bold Adult Temperament: One of the most territorial damsels available
🧠 Extremely Hardy: Tolerant of a wide range of conditions, an eager eater
🌿 Reef Safe: Won't harm corals or invertebrates
🐟 Best With Robust Tankmates: Tangs, larger angelfish, and triggerfish are best suited