Emperor angel fish

Scientific name : Pomacanthus imperator

Wonderful large size (40 cm) angel fish, with a distinctive colour pattern of diagonal yellow and blue lines, with black drawings on the head. The juvenile is black with concentric white and blue circular lines. In the larger males of the Pacific Ocean the dorsal fin ends with a short filament, missing in young and Indian Ocean specimens). Adults observed commonly along the external reef and deep reef, solitary or in pairs (actually they are haremic, but interactions are seldom observed). Juveniles are solitary and cryptic, found under coral ledges in shallow back reef or along the deep reef.
Strongly territorial, the larger males react to an intruder with loud snapping sounds. Adult colour pattern is unique. Juveniles recembles to other juvenile Pomacanthus, but are the only ones with concentric colour circles.

Associated organisms
Common in areas with a good sponge cover.