The rough whiting (Sillago nierstraszi) is a dubious species of coastal marine fish in the smelt-whiting family Sillaginidae.

[4] This remains the only specimen ever collected of the fish, and appears to be lost after McKay was unable to locate it during his revision of the family.

[2] The fish is named in honor of Hugo Frederik Nierstrasz (1872-1937), a marine biologist at Utrecht University, and a member of the 1899-1900 Siboga Expedition to the Dutch East Indies which is now Indonesia.

[5] Like all sillaginids, the rough whiting has an elongate compressed body profile which tapers toward the small terminal mouth.

This location is constant with McKay's hypothesis that the specimen is actually S. analis, which has also been recorded occasionally from lower Papua New Guinea.