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Species: Abudefduf concolor, Pacific night-sergeant

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dark + 4-5 pale bars
bone under eye fused to cheek, its edge covered by scales

Abudefduf concolor (Gill, 1862)

Pacific night-sergeant

Body relatively deep, oblong, compressed; 1 pair of nostrils; suborbital bone under eye fused to cheek, its lower border completely covered with scales; preopercle with smooth edge; mouth small, protrusible; teeth in single row, with notched or flat tips; gill rakers 20-25; a single continuous dorsal fin, XIII, 12-13; anal rays II, 10; pectoral rays 18-20; no projecting short spines at upper and lower base of tail fin; caudal fin forked; scales are moderately large and rough; body scaled, head largely scaled, as are the basal parts of the median fins; lateral line incomplete, ends under end of dorsal fin base; lateral-line scales 19-21.

Head golden brown; body grey with 4-5 relatively narrow whitish bars; most of body scales with  narrow dark outline; narrow blackish bar or wedge-shaped mark on pectoral-fin base; lips whitish.

Maximum size to 19 cm.

Inhabits rocky inshore reefs exposed to wave action.

Depth: 0-5 m.

El Salvador to Peru, including the Galapagos, Cocos and Malpelo.

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  • Marine
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Reef (rock/coral/oyster)
  • Rocks
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Omnivore
  • Sessile molluscs
  • Sessile crustacea
  • Data
  • Benthic microalgae
  • Sessile worms
Egg Type
  • Benthic
  • Pelagic larva
  • Data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Continent + Island (s)
  • TEP endemic
  • All species
  • Continent
  • Island (s)
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • South Temperate (Peruvian Province )
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Depth Range Min
  • 0
Depth Range Max
  • 5
Length Max
  • 19