The Riet River in South Africa's Eastern Cape is a significant estuarine and coastal fishery, flowing into the Indian Ocean. The system supports a productive marine and estuarine fishery, with an estimated annual harvest of approximately 2,000 tonnes of fish from South African estuaries collectively, representing about 12% of the country's annual fish catch. The river's estuary features a basic form with defined channels, sandbanks, and both natural and man-made structures that influence fish habitat. The surrounding coastline is known for its pristine beauty, attracting anglers for both recreational fishing and organized competitions.