Oreochromis variabilis (Boulenger, 1906)
Victoria tilapia
Oreochromis variabilis
photo by Loiselle, P.V.

 Family:  Cichlidae (Cichlids), subfamily: Pseudocrenilabrinae
 Max. size:  30 cm SL (male/unsexed)
 Environment:  benthopelagic; depth range 4 - 49 m
 Distribution:  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).
 Diagnosis:  Dorsal spines (total): 16-18; Dorsal soft rays (total): 10-12; Anal spines: 3-3; Anal 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).
 Biology:  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).
 IUCN Red List Status: Critically Endangered (B1ab(i,ii,iii,iv,v)) (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Luna, Susan M. - 17.10.90
 Modified by: Sa-a, Pascualita - 27.06.00
 Checked by: Sa-a, Pascualita - 31.08.94

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