The Good Fish / Bad Fish Tool
for Saltwater Aquariums,
Award-winning tool for creating ocean-friendly aquariums.

Three-Spot Domino Damselfish

BAD Fish

Scientific Name Dascyllus trimaculatus

Other Name(s) Domino Damselfish; Three-Spot Dascyllus

Care Level


Three-Spot Domino Damselfish

BAD Fish

Black with white saddle across nape and white spot on mid upper back; both diminish with age/size. Despite the likelihood that many are captured with cyanide, Three-Spot Domino Damselfish are the #3 marine aquarium fish imported into the U.S. Captive breeding has been successful at the experimental level only. Live animals should never be used to cycle new tanks. Live rock and other harmless alternatives exist.