Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; benthopelagic; depth range 1 - ? m (Ref. 5723). Tropical; 22°C - 28°C (Ref. 2059); 5°S - 10°S
Africa: Rufigi River and its tributaries; the Kilombero and Great Ruaha Rivers, but not in the delta; the Kingani, Mbenkuru and Wami Rivers, all in Tanzania. Previously, two subspecies were recognized: Oreochromis urolepis hornorum and Oreochromis urolepis urolepis.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 44.0 cm SL male/unsexed; (Ref. 4967)
(total): 16 - 18;
soft rays: 9 - 12;
Vertebrae: 29 - 30. Jaws of mature males become enlarged resulting in a concave upper profile. Females and non-breeding males silvery or steel-grey with 2-4 mid-lateral blotches and a more dorsal series usually evident. Mature males almost entirely black; lips pale or black; margin of dorsal fin and margin or upper half of caudal bright red, pink or orange. Deep preorbital bone.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Trewavas, E., 1983. Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. British Mus. Nat. Hist., London, UK. 583 p. (Ref. 2)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Fisheries: commercial; aquaculture: commercial; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01380 (0.00677 - 0.02816), b=3.02 (2.84 - 3.20), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 2.0 ±0.00 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Fec=500).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (47 of 100) .