Rhabdosargus holubi (Cape stumpnose) and Rhabdosargus globiceps (white stumpnose) are common endemic species in the shallow marinc waters of South Africa (Barnard 1925; Smith 1965), Adults of both species are found to a lesser extent in estuaries while juveniles are associated with estuaries, in particular R. holubi on the east coast and R, glob/ceps on the west coast (Talbot 1955; Wallace 1975),