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Species: Hypoatherina harringtonensis, Reef silverside

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head not deep, snout pointed
eye large
D1 before A
mouth not extendible
lower lip: no central teeth pointing out
D & A fin bases not scaled



Hypoatherina harringtonensis (Goode, 1877)

Reef silverside

Slender, elongate, compressed at rear; belly rounded; eye large 1/3 head length, equal to snout length); head relatively narrow (width 55% of head length), not very deep, upper profile relatively straight; snout somewhat pointed;  mouth oblique, top jaw not extendible; top of upper jaw straight, extends to eye, lower jaw with prominent elevation at rear (its height > 1/3 jaw length); teeth small, simple, inconspicuous, in bands on jaws, none on tongue; no forward projecting teeth on front of lower lip; gill rakers long, slender, 24 or more; 1st  dorsal V-VII spines, well in front of anal; 2nd  dorsal I, 8-10, origin over or just behind anal origin; anal I, 11-12, about same length as 2nd  dorsal, margin of fin straight; pelvic 2/3 length of pectoral, which is > ¾ length of head; scales small, 42-45 on lateral line, 6 rows above lateral line; breast and throat scaled; bases of dorsal and anal fins not scaled.

Greenish white on back, silvery with bluish reflections below; moderate silver stripe (covering 3rd  row of scales down from top plus edges of two adjacent rows) bordered above by an iridescent blue-green line, from gill opening to tail, at front silver stripe is nearly as wide as pectoral fin base; tips of tail dusky.

Size: 10 cm.

Habitat: shallow protected coastal bays and lagoons, and around reefs.

Depth: 0-10 m?

A tropical West Atlantic species that was introduced into our region at Tumaco, Colombia.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Water column only
  • Surface
  • Near Surface
  • Reef associated (reef + edges-water column & soft bottom)
  • Water column
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Planktivore
  • Carnivore
  • Data
  • Zooplankton
  • Mobile benthic worms
Egg Type
  • Pelagic larva
  • No data
  • Benthic
Global Endemism
  • Exotic (Introduced)
  • TEP non-endemic
  • All species
Regional Endemism
  • Eastern Pacific non-endemic
  • Tropical Eastern Pacific (TEP) non-endemic
  • Continent
  • Continent only
  • All species
  • Vagrant
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 10
Depth Range Min
  • 0
Depth Range Max
  • 10