There are also oreochromis hybrids and tilapia hybrids in the river, the addition species occur here thanks to the stocking of fish in settling ponds that are part of the mines attempts to clean the water that comes from underground, golf course dams belonging to the mine and a unsuccessful attempt at starting a fishery by a local farmer, who released his stock into the canal joining the mine water settling ponds to the Wonderfonteinspruit.