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; benthopelagic; depth range 4 - 49 m. Tropical; 24°C - 28°C (Ref. 2059)
Africa: Lake Victoria and its affluent rivers; the Victoria Nile above the Murchison Falls; Lakes Kyoga, Kwania and Salisbury (Ref. 5166). It is strongly declining or has disappeared in many areas of the Lake Victoria drainage (Ref. 52331).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 34290)
(total): 16 - 18;
soft rays: 9 - 11;
Vertebrae: 29 - 31. Margin of the dorsal fin orange in females and non-breeding males; intense orange to scarlet in breeding males. Profile convex immediately before the eye. Usually 2 rows of scales on cheek. Caudal not heavily scaled. Preserved specimens often show 2-3 vague dark mid-lateral blotches and one on top of the peduncle. Body color grey-green (Ref.4967).
Occurs at temperatures ranging from 23.0-28.0 °C (Ref. 3). Occasionally forms schools. Is mainly diurnal. Adults feed predominantly on bottom algae, some of the planktonic organisms that are found in their stomachs are probably those which have settled on the bottom or were washed shorewards from open waters but they do feed directly on plankton (Ref. 2).
Nests are built on sandy bottoms in shallow waters. Each nest consists of a central shallow saucer 13-15 cm in diameter, around which is a circle of small pits. This structure is the center of a larger pit, 30-39 cm in diameter. Breeding pair makes the T-stand. Female lays batches of eggs; picks them up and sucks at the male's genital tassel.
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: experimental; 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=0.01660 (0.00753 - 0.03656), b=2.98 (2.81 - 3.15), in cm Total Length, based on LWR estimates for this Genus-body shape (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
): Low vulnerability (18 of 100) .