Although not based on genetic divergences, morphological differences were found among the 4 studied areas along Namibia and the South African coast (Leslie and Grant, 1990). The same authors therefore considered as more appropriate 3 units to be assessed and managed separately like currently assumed for the fisheries: off Namibia (Maartens, 1999), W South Africa and S South Africa (Glazer and Butterworth, 2011; Kirchner, 2011).