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Species: Rivulus hartii, Giant rivulus, Jumping guabine

All Families:   All Genera:   All Species:

6-8 red-brown spotted stripes along body
D&A red-brown spots
male C: orange/yellow top & bottom margins
A 15-18
lateral scales 39-51

Rivulus hartii (Boulenger, 1890)

Giant rivulus, Jumping guabine

Body elongate, cylindrical; head flattened; sensory system on top of head with grooves and exposed pads rather than pores; covering of eye partly continuous with skin of head; mouth slightly upturned, at front, short, not reaching under eye, top jaw extendible; teeth small, weak, conical; front nostril a hole, rear nostril a small slit before and above eye; 9 lower gill rakers; fins without spines, although 1st ray may be unbranched; dorsal fin at rear of body, its origin over base of last few anal rays; dorsal fin 8-11, anal fin 15-18; pelvics on abdomen, at rear; pectorals rounded, on mid-side; tail fin rounded; body with smooth scales, 39-51 along side; lateral line reduced to sensory pits along side of body; fertilization internal, with eggs then being laid.

Grey brown above, whitish below, body with a reddish cast; 6-8 rows of red-brown spots on scales form narrow stripes along body; dorsal fin with small red-brown spots, upper margin of fin with a cream to yellow band; anal fin with red-brown spots, outer part of fin yellowish, with a fine black edge; tail fin with upper and lower margins with a broad cream stripe, center of fin with vertical rows of red-brown spots. Male: a dark blotch on midside above center of pectoral fin; bright orange to yellow upper and lower margins of tail fin. Female: a black spot bordered at the front and rear with cream, at the top of the tail fin base.

Reaches  10 cm.

Coastal fresh to brackish water.

Depth range 0-2 m.

SE Caribbean.


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Salinity
  • Brackish
  • Freshwater
  • Non Marine
Inshore/Offshore
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
Habitat
  • Estuary
  • Freshwater
  • Mangrove
FishBase Habitat
  • Demersal
Feeding Group
  • Omnivore
  • Data
Diet
  • Benthic microalgae
  • Bony fishes
  • Insects
Egg Type
  • No pelagic larva
  • No pelagic phase
  • Data
  • Benthic
Global Endemism
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent only
  • Continent
  • Caribbean endemic
  • GC endemic
Residency
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Not evaluated / Listed
CITES
  • Not listed
Length Max
  • 10
Depth Range Min
  • 0
Depth Range Max
  • 2