Humphead Bannerfish (Heniochus varius) ツノハタタテダイ also Horned Bannerfish
The juvenile Humphead Bannerfish has not developed its humphead or horns yet. Amami
An adult Humphead Bannerfish has a pair of horns over the eyes and a hump in its head over the horns. A second Humphead Bannerfish behind is making it hard to see the hump. Amami
In the upper Humphead Bannerfish you can see the hump better and one of the horns. Amami