Shorefishes of the Greater Caribbean online information system

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Species: Neopomacentrus cyanomos, Crescent Damselfish, Regal Demoiselle, Violet Demoiselle

All Families:   All Genera:   All Species:

elongate, oblong, dark brown
dark brown
shoulder: black blotch
D rear edge: white/cream blotch
tips D, A & C filamentous
inner pectoral base black
C lunate, white center + lobes dark



Neopomacentrus cyanomos (Bleeker, 1856)

Regal Demoiselle, Violet Demoiselle, Crescent Damselfish

Body an elongate oblong, compressed; teeth on jaws in 2 rows, at least at front; outer row of teeth with flattened tips; rear edge of preopercle rippled or finely serrated; gill rakers 21-24 (6-8 + 15-17); dorsal fin XIII,11-12; anal II, 10-12; pectoral 17-18; rear tips of dorsal and anal fins of adult filamentous; tail fin lunate, tips filamentous, in adult, its base without projecting spiny rays; head largely scaled; edge of bone under eye hidden by scales; scales large, 16-18 on lateral line.

Head and body dark brown; scales on back and lower body sometimes with indistinct bluish spots, one per scale; a large, oval black spot with greenish iridescence at origin of lateral line at top corner of operculum; dorsal fin dark brown, with a dark rear filament, and a prominent white to yellow blotch at rear insertion, that extends out along rear border of fin; tail fin dark brown, with an abruptly white to yellowish crescent along the rear edge and center of fin; anal and pelvic fins brown to whitish brown; pectoral translucent, with dark spot at its upper base.

Reaches 12.5 cm

Aggregations in near-bottom waters over coral heads and at the tops of upcurrent edges of small and large dropoffs, on outer reefs as well as inshore on sheltered reefs.

Depth range 0-53 m

Indo-West Pacific; introduced to the Gulf of Mexico and SE Caribbean

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Reef only
  • Rocks
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Planktivore
  • Data
  • Zooplankton
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Exotic (Introduced)
  • Greater Caribbean non-endemic
Regional Endemism
  • Continent
  • Continent only
  • Exotic (Introduced)
  • GC non-endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Listed
  • Vulnerable
  • Not listed
Length Max
  • 12.5
Depth Range Min
  • 0
Depth Range Max
  • 53