Shorefishes of the Greater Caribbean online information system

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Species: Pomacanthus semicirculatus, Semicircle Angelfish

All Families:   All Genera:   All Species:

brownish-green + dense blue spots
blue: eye-ring, edges preopercle & opercle
juv: rear body bars semicircular
juv: C dark + white bars & margin
C black + blue spots
fin edges blue

Pomacanthus semicirculatus (Cuvier, 1831)

Semicircle Angelfish

Deep, almost circular, compressed body; head deep, snout short; mouth small, with brush-like teeth; preopercle with a large spine at its angle, with vertical margin smooth; bone between preopercle and operculum without spines; bone under eye without large, rear-pointing spines; gill rakers 4-5+13; dorsal fin un-notched, XIII, 21-23; anal rays III, 20-22; front soft rays of dorsal and anal fin both with filaments; tail fin rounded; body with large and small scales, irregularly arranged, very rough, with distinct ridges on the exposed part, ~75 lateral scales; scales extend out onto the median fins; without "axillary process" (an enlarged scale) at the base of the pelvic fins; lateral line complete.

Adult: brownish green, center of body paler; margins of all fins except pectorals blue; edges of cheek, gill cover and cheek spine blue; mouth yellow. Juvenile: dark blue, with thin white bars, those on rear body semicircular; tail fin dark, with white bars and white edge.

Size: to 35 cm.

Habitat: Protected coastal coral rich reefs; juveniles on shallow reefs mixed with sand.

Depth: 1-105 m.

Indo-central Pacific: introduced to southeast Florida.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Reef only
  • Corals
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Omnivore
  • Data
  • Sponges/seasquirts/bryozoa
  • Benthic microalgae
Egg Type
  • Data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • Exotic (Introduced)
  • Greater Caribbean non-endemic
Regional Endemism
  • Continent
  • Continent only
  • Exotic (Introduced)
  • GC non-endemic
  • All species
  • Vagrant
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 35
Depth Range Min
  • 1
Depth Range Max
  • 105