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Some species, occur singly or in pairs, e.g. Forcipiger. Others are schooling fish. The black, white, and yellow pyramid butterfly fish (Hemitaurichthys polylepsis), for example, occurs in massive aggregations along the walls in Manado and other parts of eastern Indonesia, Common schooling butterflyfish include the bannerfish (Heniochus), the most distinctive of which is the pennant bannerfish (Heniochus diphreutes), which has a very elongated dorsal fin and bright yellow, white and black markings,

Angelfish. The angelfishes (family Pomacanthidae) probably make it onto more postcards than any fish other than the Moorish idol. They browse the reef for sponges, algae and occasional small crustaceans. Adult angelfish, some of which can reach 30 centimeters, are truly magnificent animals.

The twinspot lionfish, Dendrochirus biocellatus, is one of the most attractive of the dwarf lionfishes. It is much smaller than Pterois sp., growing to just 8 centimeters. Halmahera, Maluku.

In Indonesia, one can often see emperor angelfish (Pomacanthus imperator), with thin, horizontal stripes of blue and yellow; blue-girdled angelfish (P. [Euxiphipops] navarchus), with a deep blue "girdle" against bright orange; and regal angelfish (Pygoplites diacanthus), the most shy of the bunch, with vertical stripes of yellow, white and blue.