The rough whiting, Sillago nierstraszi, is a dubious species of coastal marine fish in the smelt-whiting family Sillaginidae. The species is known only from the holotype which was collected in 1941 on the south coast of Papua New Guinea, but is thought to be lost. S. nierstraszi is currently a valid species, although during his revision of the sillaginids, Roland McKay suggested the species to be a senior synonym of Sillago analis.