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Marine spacies of Thailand

Species of Thailand

Blue ring angelfish

Binomial name: Pomacanthus annularis, Marcus Elieser Bloch, 1787

The blue ring angelfish (Pomacanthus annularis) is an angelfish of the family Pomacanthidae, found in the Indo-West Pacific oceans from East Africa, throughout Indonesia and New Guinea to New Caledonia, north to southern Japan.

In the aquarium

It is highly sought after and prized member of the Pomacanthus genus, composed of large marine angelfish. Blue ring angelfish can reach up to 12 inches in the wild and often obtain lengths near that in captivity.

It bears a considerable resemblance to the Emperor Angelfish in that it undergoes changes in coloring in its development from youth to maturity. The young of the blue ring angelfish are at first a dark blue, almost black, with broad turquoise and white vertical stripes. Adults will exhibit a violet coloring with semicircular marks on the middle of the body.

In the aquarium blue ring angelfish are algae grazers but consume fish and coral flesh as well. They are known to eat shrimps and nibble on both large polyped stony and small polyped stony corals. Overall most seasoned reef aquarists do not recommend keeping this species in a reef aquarium due to these habits.

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Scientific classification

Pomacanthus annularis

Common names

  • English:
    • Blue ring angelfish
    • Blue-ringed angelfish
    • Ringed angelfish


  • Chaetodon annularis, Marcus Elieser Bloch (1787)
  • Pomacanthodes annularis, Marcus Elieser Bloch (1787)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Range map of Pomacanthus annularis in Thailand

Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.

Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.

It is free to use this map on various media. See the creative common license terms by clicking "CC" icon below the map. But remember, again; the map may not be accurate or complete.

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Please help us improving our species range maps. To add a new location to the range map we need a clear image of the specimen you have encountered. No problem if you do not know the species, we will do our best to identify it for you.

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