In south Africa the waves turn up cold water and nutrients when the sun hits the nutrients the process of occurs greatly increasing the amount of like present?

This process you are describing is likely upwelling, where cold nutrient-rich water from deeper levels rises to the surface. This increased nutrient availability supports the growth of phytoplankton and other marine life, which in turn attracts larger marine species and enhances the overall ocean ecosystem's productivity. This phenomenon is essential for supporting diverse marine life and fisheries along the South African coast.