![]() ![]() It extends north to the Kansai region and to the southern regions of Japan and south to the Great Barrier Reef of Australia, New Caledonia and the Austral Islands in French Polynesia. It occurs from the Red Sea southwards along the East African coast to Mozambique and Madagascar, eastwards through the Indian and Pacific Oceans as far as the Tuamotu Islands and the Line Islands. The emperor angelfish has a wide Indo-Pacific distribution. This species attains a maximum total length of 40 cm (16 in). The dorsal fin has 13–14 spines and 17–21 soft rays while the anal fin has 3 spines and 18–21 soft rays. The anal fin has a dark blue background with lighter blue horizontal stripes. ![]() The front margin of this band is bright blue and the rear margin is a thin yellow line. There is a blackish band above the pectoral fins, the top of which is at the level of the upper orbit. The adults are striped with blue and yellow horizontal stripes, a light blue face with a dark blue mask over the eyes and a yellow caudal fin. The dorsal fin has a white margin and the caudal fin is transparent. These lines become vertical at the anterior end. The juveniles have a dark blue body which is marked with concentric curving lines, alternating between pale blue and white with the smallest which are completely enclosed within each other located posteriorly. The emperor angelfish shows a marked difference between the juveniles and the adults. ![]()
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