Pomacanthus semicirculatus

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See Talk:Pomacanthus semicirculatus for individual experiences with this species, Pomacanthus semicirculatus. Feel free to add your own personal experiences.

Common Name
Semicircle Angel
Binomial Name
Pomacanthus semicirculatus
Pomacanthus semicirculatus juv 01.jpg
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Pomacanthidae
Genus: Pomacanthus
Species: semicirculatus

Common Names

  • Semicircle Angel
  • Koran Angel



As a juvenile P.semicirculatus bears striking blue and white stripes over a dark (black) body, as it matures the markings fade to dark blue/black spots against and yellow/green body. Often confused at the juvenile stage with similar looking species P. imperator, P. chrysurus and P. maculosus.

Similar Species

Maximum Size

Up to 400mm [1]

Associated Organisms



Generally well accepted in reef aquariums, however care should be taken with other angels or tangs as they can display aggression to perceived competitors. Active in the aquarium, Angels can often be found darting from hide to hide.

Captive Care

Tank Size

Medium to large aquariums, >200L with a minimum width of 500mm.

Water Flow

Will accept a wide range of flow.


Low to intense lighting is acceptable.


Natural diet consists of sponges, tunicates and algae [1] in aquaria they will readily take frozen and dried foods with an emphasis on algae. Nori (Japanese Sushi Seaweed) is a favourite meal.

Growth Rate

Reaches sexual maturity within 4 1/2 years [1].


Often afflicted by Lymphocystis and susceptible to common fish diseases.





Avoid housing with similar species and potential competitors such as Tangs


Not compatible with many sponges and tunicates.


Generally not compatible with shrimp.


How it reproduces, how suitable it is to breeding or captive propagation, techniques on how to etc.

Local Ecology


Found throughout the Indian Ocean and West Pacific, from East Africa and the Red Sea west to Samoa, north to southern Japan, south to Western Australia, New South Wales and Lord Howe Island [1].


Found on inshore and outer reefs down to 30m [1].

Additional Information

Some additional notes on it that don't fit in the above sections.



  1. 1.0 1.1 1.2 1.3 1.4 (http://www.fishbase.org): Froese, R., Pauly, D. Fish Base, World Wide Web electronic publication, 2008.