Pomacanthus xanthometopon is a ray-finned fish in the family Pomacanthidae found in shallow parts of the Indo-Pacific. It is commonly known as the blueface angelfish or the yellowface angelfish because of its striking facial colouration.
The yellowface angelfish grows to a maximum length of 38 centimetres (15 in) and is laterally compressed. The mouth is just above the tip of the snout. The fins are large and rounded and are yellow, some edged with blue round the margins. The dorsal fin is set just in front of the caudal region, has a distinctive black eyespot at the base and has 13â€“14 spines and 16â€“18 soft rays. The anal fin has 3 spines and 16â€“18 soft rays. The scales are pale blue edged with yellow giving a reticulated pattern. The face is yellow with a dense network of brilliant blue lines on the bottom half and a plain yellow mask around the eyes. Juveniles are quite differently coloured with 6 vertical white bars separated by pale blue lines and a caudal fin barred in 2 shades of blue. The juveniles change colour gradually after reaching a length of 7 to 12 centimetres (2.8 to 4.7 in). This species can be confused with the queen angelfish (Holacanthus ciliaris) or the blue angelfish (Holacanthus bermudensis), but both these have a completely blue face and lack the caudal eyespot.
The yellowface angelfish usually lives singly or in pairs and feeds on tunicates, sponges, other encrusting organisms and algae. It is an egg-laying species and scatters its eggs on the seabed.