Semicircle Angelfish

ID points

• Adults grey-green, with blue on the gill cover and fin edges
• Juveniles have alternating white and blue semicircular arcs on deep blue
• Rear ends of the dorsal and anal fins drawn out into points

Basics

Family

Pomacanthidae

Length

25–40 cm

Depth

1-40 m

Regions

Indo-Pacific reefs

Distribution

Indo-Pacific coral reefs

Habitat

Coastal reefs with rich coral growth

Diet

Sponges, tunicates

Easily confused with

Regal AngelfishBlue-edged white diagonal bands on an orange-yellow groundEmperor AngelfishAdults have fine parallel diagonal lines alternating yellow and blueQueen AngelfishA black crown spot ringed in bright blue on top of the head

Fun fact

Juveniles are blue-black with white semicircular bars, while adults shift to an olive-brown ground covered in a blue net of markings. The change is hard to believe.

More in this family

• Bicolor Angelfish
• Flame Angelfish
• French Angelfish