Shorefishes of the Eastern Pacific online information system

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Species: Stegastes acapulcoensis, Acapulco damselfish

All Families:   All Genera:   All Species:

body: front pale, back dark
pectoral: inner base & upper rays white
juvenile: black & blue + 2 ocelli, D - brown border
pectoral 21-22 (20-23)
gill rakers 17-21

Stegastes acapulcoensis (Fowler, 1944)

Acapulco damselfish

Body oval, robust, compressed; 1 pair of nostrils; margin of preopercle serrated; margin of bone under eye serrated, without notch it and the bone before it; mouth small, protrusible; teeth in single row, long and close-set; gill rakers 17-21; a single continuous dorsal fin, XII, 15 (rarely 16); anal rays II, 13; pectoral rays usually 21 or 22 (rarely 20 or 23); no projecting short spines at upper and lower base of tail fin; caudal fin bluntly forked; scales are moderately large and rough; body scaled, head largely scaled (snout scaled to nostrils), as are the basal parts of the median fins; lateral-line scales 20; lateral line incomplete, ends under end of dorsal fin base.

Grey-brown, lighter on head and anterior part of body, most of scales with blackish margin; white uppermost pectoral rays, a prominent white band across base of rays on outer face of pectoral-fin axil; juveniles  bright blue with a prominent ocellus at the base of the soft dorsal fin and an ocellated black spot on the dorsal edge of the caudal peduncle.

Size: reaches a length of 18 cm.

Occurs along rocky shores.

Depth: about 1-16 m.

The central Gulf of California to Chile plus the Revillagigedos, Galapagos, Cocos and Malpelo.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Reef only
  • Rocks
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
  • Corals
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Omnivore
  • Data
  • Sessile crustacea
  • Benthic microalgae
  • Mobile benthic crustacea (shrimps/crabs)
  • Sessile worms
Egg Type
  • Pelagic larva
  • Data
  • Benthic
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Island (s)
  • TEP endemic
  • Continent + Island (s)
  • Continent
  • All species
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Depth Range Max
  • 16
Depth Range Min
  • 1
Length Max
  • 18