The second part is Sargos, a name used for Sparid fish in ancient Greek at least as long ago as Aristotle but in this case is a reference to Sargus as a synonym of Diplodus.

[2] Rhabdosargus globiceps is endemic to Southern Africa where it is found in the southeastern Atlantic from Angola south to the Western Cape east into the southwestern Indian Ocean where it reaches as far north as KwaZulu-Natal.

The juvenile fish are common in inshore waters of estuaries and bays where they may be found in the surf zone, in seagrass beds and in coastal lagoons.

There is a subpopulation of the white stumpnose in the Langebaan Lagoon on the Atlantic coast of the Western Cape and these fishes are found in tidal channels and over sandy substrates.

Tagging studies have shown that this population is rather mobile, spending midwinter in Saldanha Bay and the rest of the year in the Langebaan Lagoon where they are rather sedentary but will commute daily to preferred sites.

[1] Rhabdosargus globiceps is an economically important species, large numbers are caught by net fishers and anglers in the Cape of Good Hope region, often catching the fish inshore at night.