Shorefishes of the Greater Caribbean online information system

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Species: Membras analis, Backwater Silverside

All Families:   All Genera:   All Species:

body depth > 15.7% SL
shallowest part of tail base > 8.5% SL
gill rakers 15-17
anus ~midway A to pelvic base
pelvics reach to/past anus
rear edges flank scales smooth/irregular

Membras analis (Schultz, 1948)

Backwater Silverside

Slender, elongate, compressed, body depth >15.8% SL; least depth of tail base >8.5% SL; top jaw strongly extendible, premaxilla with rear end greatly expanded, without expanded bony process above its center; sensory pits on top of snout are 4 large quadrangular depressions; <18 (usually 15-17) gill rakers; first dorsal V, spines, origin well before origin of anal; anus about midway between origin of anal fin and base of pelvic; tips of pelvics reaching vent; pectoral short and blunt, but reaches just past origin of pelvic; flank scales with smooth or irregular (but not fringed) rear edges; pelvic axillary scale >1/3 fin length.

Pale to translucent; dark speckling above prominent silver flank stripe .

Size: 7.2 cm.

Habitat: coastal lagoons, schooling.

Depth: 0-10 m?

Colombia and Venezuela.

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  • Brackish
  • Hypersaline
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Mid Water
  • Near Surface
  • Surface
  • Water column only
  • Water column
  • Estuary
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
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 7.2
Depth Range Min
  • 0
Depth Range Max
  • 10