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Species: Membras species A, Pigmy Silverside

All Families:   All Genera:   All Species:

body depth < 15.8%
shallowest part of tail base < 8.5%
gill rakers 18-19
anus ~midway A to pelvic base
pelvics reach to/past anus
rear edges of nape & flank scales smooth/irregular

Membras species A

Pigmy Silverside

Slender, elongate, compressed; body depth <15.8% SL; least depth of tail base <8.5% SL; 4 large quadrangular sensory pits on top of snout; top jaw strongly extendible, premaxilla with rear end greatly expanded, without expanded bony process above its center; 16 or more (usually 18-19) gill rakers; first dorsal V, origin well before origin of anal; pectoral reaches past origin of pelvic; anus about half way between anal fin origin and pelvic base; pelvics reach to or past anus; rear edges of side scales smooth or irregular, not fringed; pelvic axillary scale >1/3 fin length.

Pale to translucent; prominent silver flank stripe, which occupies amost entire side of body at rear.

Size: 6 cm.

Habitat: coastal lagoon with mangroves.

Depth: 0-10 m?

Known only from Brus Lagoon, Honduras.

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  • Brackish
  • Non Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Mid Water
  • Near Surface
  • Surface
  • Water column only
  • Water column
  • Estuary
  • Mangrove
FishBase Habitat
  • Pelagic
Feeding Group
  • Data
  • Planktivore
  • Data
  • Zooplankton
Egg Type
  • Benthic
  • Data
  • Pelagic larva
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
  • Not evaluated / Listed
  • Not listed
Length Max
  • 6
Depth Range Min
  • 0
Depth Range Max
  • 10