A high density fish polyculture investigation was conducted during the summer season of 1984-1985 at the Umtata Dam Fish Research Centre, Transkei . Fish species used, included the cross-breed between the Israeli Dor 70 and the Aischgrund varieties of the European common carp Cyprinus carpio, bighead carp Aristichthys nobilis, black carp Mylopharyngodon piceus, grass carp Ctenopharyngodon idella, silver carp Hypophthalmichthys molitrix and tilapia, Oreochromis mossambicus. Fresh pig manure was used as nutrient to stimulate pond productivity. In addition, some ponds also received formulated feed. With pig manure alone, a net fish production of 1,66 t ha-1 was achieved over a period of 175 days. Where feed was also provided to the fish, the fish yield over the same period amounted to 8,57 t ha^-1. The pond water effluent was used for vegetable production.