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Species: Fundulus grandissimus, Giant Killifish

All Families:   All Genera:   All Species:

snout ~ 2x eye
no scales before eye
D origin before/over A origin
gill rakers 8-11
tail base least depth > 13% SL
12 chin pores
female: pouch before A > 10% fin length
37-41 lateral scales
predorsal scales 21-25

Fundulus grandissimus Hubbs, 1936

Giant Killifish

Body moderately slender, compressed; head flattened above, with straight upper profile; snout long, ~2 times eye diameter; cover of eye not continuous with head skin; front nostril not tubular; mouth large, slightly oblique, opens at front, protrusible, top jaw twisted, lower jaw projecting; 12 pores under chin; jaws with outer row of pointed conical teeth, inner band of simple teeth; gill rakers 8-11; no spines in fins; dorsal fin short based, its origin over or slightly before anal fin origin, 10 (10-12) rays; anal fin with 3rd fin ray branched, 9 (9-12) rays, females with a well developed fleshy pouch at its front base that is >10% of fin base; pectoral with narrow base, rounded, inserted low on side; pelvics inserted well behind pectoral base; least depth of tail base >13% SL; tail fin rounded; small smooth scales, 37-41 midlateral rows; scales before dorsal fin 21-25; scales before eye absent; lateral line reduced to a series of pits along side of body.

Male blue to olive, with light vertical streaks and light spots; females are olive; median fins of both sexes blue, with light spots.

Reaches 20 cm.

Fresh to brackish water.

Depth range: 0-1 m.

The southern Gulf of Mexico.

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  • Brackish
  • Freshwater
  • Non Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Submerged vegetation
  • Estuary
  • Freshwater
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Omnivore
  • Data
  • Benthic microalgae
  • Bony fishes
  • Insects
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
Egg Type
  • Benthic
  • Data
  • No pelagic larva
  • No pelagic phase
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent
  • Continent only
  • GC endemic
  • All species
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Listed
  • Vulnerable
  • Not listed
Length Max
  • 20
Depth Range Min
  • 0
Depth Range Max
  • 1