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Species: Oreochromis niloticus niloticus, Nile tilapia

All Families:   All Genera:   All Species:

grey, dark blotch operculum corner
C: 7-12 long narrow bars
male: grey, head & front D reddish
juv: ~9 bars, ocelus base front soft D, operculum corner spot
lower gill rakers 20-21

Oreochromis niloticus niloticus (Linnaeus, 1758)

Nile tilapia

Body an elongate oblong; 1 pair of nostrils; top jaw highly protrusible; jaws of mature males are enlarged, resulting in a concave forehead; teeth fine, close set, in several rows on jaws, 3-5 rows, outer row 2-pointed, outer row readily movable; fine teeth on throat plate that is longer than wide; gill rakers simple, lower rakers 20-21 (19-26); one dorsal fin XVII (XVI-XVIII), without a notch between spines and rays, 12 (10-14), longest soft ray extending onto base of tail in female and ¾ of tail in male; anal fin III, 9-12; tail fin straight; scales large, 2-3 horizontal rows on cheek, 4-5 rows between dorsal origin and lateral line; tail fin not densely scaled;  lateral line in 2 straight overlapping sections, with 32-33 (30-34) scales; genital papilla large, elaborate.

Female and non-breeding male: silvery gray, sometimes indistinct dark bars; a dark blotch at top rear corner of operculum; tail fin covered with 7-12 narrow dark bars. Juveniles with a large dark, whitish edged spot on base of front dorsal soft fin rays, body with ~9 dark bars, opercle with a dark spot. Breeding male: grey body and fins; head, tail fin and front of dorsal fin with a reddish cast.

Reaches 60 cm.

Lives in fresh and brackish water.

Depth range: 0-5 m.

Originally from SE Africa; introduced widely throughout our region for aquaculture purposes.


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Salinity
  • Brackish
  • Freshwater
  • Non Marine
Inshore/Offshore
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
Habitat
  • Estuary
  • Freshwater
FishBase Habitat
  • Demersal
Feeding Group
  • Omnivore
  • Planktivore
  • Detritivore
  • Data
Diet
  • Insects
  • Benthic microalgae
  • Detritus
  • Zooplankton
  • Phytoplankton
  • Mobile benthic worms
Egg Type
  • Brooded
  • Data
  • No pelagic phase
  • No pelagic larva
Global Endemism
  • Greater Caribbean non-endemic
  • Exotic (Introduced)
Regional Endemism
  • Island (s)
  • Continent
  • GC non-endemic
  • Continent + Island (s)
  • Exotic (Introduced)
Residency
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Not evaluated / Listed
CITES
  • Not listed
Length Max
  • 60
Depth Range Min
  • 0
Depth Range Max
  • 5