saltwater, reef fish
Yellowface Angelfish
Pomacanthus xanthometopon
Oval-shaped, highly compressed body. Striking coloration with a distinctive yellow mask over the eyes. The body features a blue latticework pattern over a brownish-yellow ground color. It has a bright yellow dorsal fin with a dark blue eye-spot (ocellus) on the rear, and a yellow caudal fin.…
- Habitat
- Inhabits coral-rich areas of lagoon and seaward reefs at…
- Size & weight
- Reaches a maximum length of about 38 centimeters (15 inc…
- Diet
- Omnivorous, primarily feeding on sponges, tunicates, and…
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Physical characteristics
Oval-shaped, highly compressed body. Striking coloration with a distinctive yellow mask over the eyes. The body features a blue latticework pattern over a brownish-yellow ground color. It has a bright yellow dorsal fin with a dark blue eye-spot (ocellus) on the rear, and a yellow caudal fin. The face is bright blue with yellow speckles.
Habitat & distribution
Inhabits coral-rich areas of lagoon and seaward reefs at depths of 5 to 30 meters. Distributed across the Indo-Pacific, from the Maldives to Vanuatu and north to the Ryukyu Islands.
Behavior
Generally solitary and territorial. They are diurnal, being active during the day as they forage along the reef, and seek shelter in crevices at night.
Diet
Omnivorous, primarily feeding on sponges, tunicates, and other encrusting organisms, as well as algae.
Reproduction
Pelagic spawners. They form pairs and release eggs and sperm into the water column. The larvae are planktonic before settling into reef habitats and undergoing a dramatic color transformation from juvenile to adult.
Ecological role
Serves as an important grazer on reef surfaces, helping to control growth of sponges and tunicates. Provides a food source for larger reef predators.
Similar species
Blueface Angelfish (often used as an alternative name); it can be distinguished from other Pomacanthus species by the unique yellow 'mask' and the ocellus on the dorsal fin.
Identification tips
Look for the vivid yellow mask covering the eye area and the bright blue 'chin'. The dark blue spot on the back of the yellow dorsal fin is a definitive field mark.
Interesting facts
Juveniles look completely different from adults, featuring a dark blue body with vertical white and light-blue stripes, a common trait in the genus Pomacanthus to avoid territorial aggression from adults.