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Species: Odontognathus mucronatus, Guiana Longfin Herring

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belly keel - gap under pectoral base
A 70-85

Odontognathus mucronatus Lacepede, 1800

Guiana Longfin Herring

Body elongate, very compressed; top of head concave; mouth small, directed up, lower jaw projecting; upper jaw long, extending to or past gill opening; very small dorsal fin, behind mid-body; anal fin base very long (70-85 rays), its origin well before dorsal; pectorals large, low on the side just behind the head; no fin spines; no pelvic fins; a forked tail fin; a convex keel on belly formed by 7-8 scutes (spiny scales) before the pectoral, a gap under pectoral base, and 12-13 scutes behind it, outer edges of scutes smooth, not serrated.

Body yellowish white with thin white midlateral stripe; head silvery; midline of head and back dark; anal fin dark, other fins clear to white.

Reaches 17.5 cm.

Lives in shallow coastal waters over mud and sand bottoms; common in estuaries and ascends rivers.

Depth: 0-40 m.

Venezuela to southern Brazil.

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  • Brackish
  • Freshwater
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Mid Water
  • Near Surface
  • Surface
  • Water column only
  • Water column
  • Estuary
  • Freshwater
FishBase Habitat
  • Pelagic
Feeding Group
  • Carnivore
  • Data
  • Planktivore
  • Data
  • Zooplankton
  • Bony fishes
Egg Type
  • Data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent only
  • Extends South of GC
  • GC non-endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 17.5
Depth Range Min
  • 0
Depth Range Max
  • 40