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Species: Atherinella robbersi, Totumo Silverside

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D1 origin just behind A spine
gill rakers 13-16
pectoral 13
A 17-18, scale sheath +/- 1st several rays
scales: lateral 35-44, transverse rows 6, around body 17-20

Atherinella robbersi (Fowler, 1950)

Totumo Silverside

Elongate; sensory system on snout not as 4 large quadrangular pits; top jaw extendible, premaxilla with rear end greatly expanded, without expanded bony process above its center; 13-16 lower gill rakers; dorsal fin IV, its origin just behind line through the base of the anal fin spine; anal rays I, 17-18; pectoral 13, short, reaching only to about base of pelvic fins, inserted high on body, above mid-level of eye; mid-side scales about 48-49; 6 transverse scale rows; 17-20 scales around circumference of body; at most a couple of scales on base of first few rays of anal fin; a large scale at base of pelvic fins.

Pale brown with a slight yellow tint above; prominent midlateral silver stripe; tail fin dusky, sometimes tinted with orange-pink.

Size: reaches 7.5 cm.

Habitat: coastal marshland and estuary.

Depth: 0-10 m?

Known only from the Totumo lagoon, Colombia.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Mid Water
  • Near Bottom
  • Water column only
  • Sand & gravel
  • Water column
  • Estuary
  • Mangrove
  • Mud
FishBase Habitat
  • Pelagic
Feeding Group
  • Data
  • Omnivore
  • Planktivore
  • Data
  • Insects
  • Mobile benthic crustacea (shrimps/crabs)
  • Phytoplankton
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
  • Not evaluated / Listed
  • Not listed
Length Max
  • 7.5
Depth Range Min
  • 0
Depth Range Max
  • 10