 South Africa's aquaculture industry is the most productive of the three countries’.It produces abalone, mussels, oysters, seaweed and prawns, with abalone the most important of these in terms of volume and employment.In Namibia, mussels, oysters, "Gracilaria" (red seaweed used by the pharmaceutical industry) and abalone are farmed, but the aquaculture industry is dominated by oyster production.