An aquarium angelfish (Pterophyllum)—Jane Burton—Bruce Coleman Ltd.

Any of various fishes of the order Perciformes. The best-known angelfishes are freshwater cichlids (genus Pterophyllum) popular in home aquariums. These are thin and deep-bodied fishes that usually are silver with vertical dark markings but may be solid or partially black; they may grow to 6 in. (15 cm) in length. Brightly coloured marine angelfishes are in the family Pomacanthidae. They are found among tropical reefs in the Atlantic and the Indo-Pacific, where they eat algae and marine invertebrates and reach a maximum length of 18 in. (46 cm).

This entry comes from Encyclopædia Britannica Concise.
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