The Three Spot Dascyllus (Dascyllus trimaculatus) is a common inhabitant of coral reefs and is a member of the ‘Damselfishes’ family Pomacentridae. It can be found occurring in the warm tropical waters of the Indo-Pacific region and its distribution extends from the Red Sea and East Africa to the Line and Pitcairn islands, north to southern Japan and down south to Sydney in Australia where juveniles occasionally turn up over the summer period.
This species can be found occurring on coral and rocky reefs and the juveniles are often found in association with large sea anemones, sea urchins or small coral heads. The juveniles are black in colour with the scale centres bluish and a small white blotch on the fore head. The adults lack the spot on the forehead and are generally more grey-silver in colour however this varies depending on their geographical location. The Three Spot Dascyllus (Dascyllus trimaculatus) is known to feed on algae, copepods and planktonic crustaceans and grows to a maximum length of approximately 11cm.