Rhabdosargus holubi, the Cape stumpnose, is a species of fish in the seabream family, Sparidae. It is native to southern Africa, where it can be found mainly along the eastern coast of South Africa.

Taxonomy Rhabdosargus holubi was first formally described as Sargus holubi by the Austrian ichthyologist Franz Steindachner with its type locality given as Algoa Bay in South Africa. The genus Rhabdosargus is placed in the family Sparidae within the order Spariformes by the 5th edition of Fishes of the World. Some authorities classify this genus in the subfamily Sparinae, but the 5th edition of Fishes of the World does not recognise subfamilies within the Sparidae.

Etymology Rhabdosargus holubi belongs to the genus Rhabdosargus, a name which is a refixes rhabdos, meaning "stick" or "rod", an allusion to the yellow abdominal band of Sargus auriventris, its type species, to 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. The specific name, holubi, honours the collector of the type, Emil Holub who was a Czech physician, cartographer and ethnographer.

Description Rhabdosargus holubi is usually around 15 cm (5.9 in) long, but specimens of 40 cm (16 in) have been seen. It is a shiny silver fish with a gold line from head to tail. The dorsal fin has 11 spines.