AngelfishesPomacanthidae

Angelfishes (Pomacanthidae), whose name derives from the Greek for 'cover spine' in reference to their distinguishing preopercular spine, are deep-bodied, laterally compressed marine fishes. They are recognised by a prominent, often backward-pointing spine on the preopercle edge, which sets them apart from similar families. Their small mouths contain brush-like teeth, and their dorsal and anal fins are continuous. Many species display bold and intricate patterns of stripes, spots, or eye-spots, often in combinations of blue, yellow, orange, or black. Adults range in size from 10 cm (4 in) to over 60 cm (24 in), with many species commonly reaching 20-30 cm (8-12 in). Juveniles typically exhibit distinctly different colouration from adults.

These fish inhabit coral and rocky reefs, typically from 1 to 60 metres (3-197 ft) deep, making them a common sight on reef slopes and drop-offs. Juveniles are found in shallower, more sheltered areas. Most species are observed singly or in stable pairs, actively grazing on their omnivorous diet, which primarily consists of sponges, tunicates, algae, and small invertebrates. Some species are known to be territorial, defending a specific patch of reef against intruders.