Just a little info here:
Quote Originally Posted by Calif. Dept of Fisheries p.196
The native range of the Mozambique tilapia is the eastward-flowing rivers of Africa, from the lower Zambezi and Shire systems in Mozambique southward in coastal drainages to Algoa Bay in South Africa. The Mozambique tilapia and the Wami tilapia (Tilapia urolepis) are closely related, similar in appearance, and hybridize readily. Trewavas (1968) first recognized them as distinct species.