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Species: Gambusia luma, Sleek Mosquitofish

All Families:   All Genera:   All Species:

under eye - dark bar
C top margin yellow
D 6-7
A 10
Belize & Honduras
gill rakers 13-14
male: pectoral 5th ray scalloped, sex organ - no palp, + hooks above tip
lateral scales 29

Gambusia luma Rosen & Bailey, 1963

Sleek Mosquitofish

Head and body moderately robust, moderately compressed at rear; head depressed; front nostril not tubular; covering of eye not continuous with skin of head; mouth small, opens at front, slightly oblique, lower jaw slightly projecting, top jaw protractile; jaw teeth consist of an outer row of large backward curved teeth, and several rows of small pointed teeth; 13-14 gill rakers; 1 dorsal fin with short base, at rear of body, 6-7 rays; anal fin origin distinctly before dorsal fin origin in both sexes, female with 10 rays; pelvic origin well behind pectoral base, near anal fin, tips of fins of males not swollen; pectorals high on flank, 14-15, modified in male, with 5th ray scalloped near its tip; 3rd anal ray unbranched; anal fin modified in male to form an elongate sex organ, tip of that organ curved upwards, with 2 long upward pointing claws on the top side, without a fleshy palp; tail base relatively narrow; tail fin rounded; scales smooth and relatively large; 29 in lateral series.

Light olive, body without dark spots; a dark oblique bar under eye; upper rear margin of tail fin in both sexes yellow-orange; dorsal and tail fins with dark spots that may form lines.

Reaches 5.5 cm.

Freshwater and brackish water.

Depth 0-1 m.

Belize to Honduras.

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  • Brackish
  • Freshwater
  • Non Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Estuary
  • Freshwater
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Detritivore
  • Data
  • Detritus
  • Insects
Egg Type
  • Data
  • Live birth
  • No pelagic larva
  • No pelagic phase
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Caribbean endemic
  • Continent
  • Continent only
  • GC endemic
  • All species
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 5.5
Depth Range Min
  • 0
Depth Range Max
  • 1