Sillago

Sillago is a genus of fish in the family Sillaginidae and the only non-monotypic genus in the family. Distinguishing the species can be difficult, with many similar in appearance and colour, forcing the use of swim bladder morphology as a definitive feature. All species are benthic in nature and generally coastal fish, living in shallow, protected waters although there are exceptions. Minor fisheries exist around various species of Sillago, making them of minor importance in most of their range. This genus has the widest distribution of any smelt-whiting genus, spanning much of the Indo-Pacific. The genus ranges from the east coast of Africa to Japan in the east and Southern Australia in the south, with most species concentrated around South East Asia, the Indonesian Archipelago and Australia. Many species have overlapping distribution, often making positive identification hard. The genus Sillago is one of five genera in the family Sillaginidae, itself part of the Percoidea, a suborder of the Perciformes. The name was first coined by famed taxonomist Georges Cuvier as a genus for his newly described species, Sillago acuta, which was later found to be a junior synonym of S. sihama. John Richardson placed the genus, along with Sillaginodes and Sillaginopsis in a family, which he named the Sillaginidae in 1846. Many species, both valid and invalid were added to the genus and it was not until 1985 when Roland McKay of the Queensland Museum published a revision of the family Sillaginidae that the complex relationships between these names was cleared up. McKay further divided Sillago into three subgenera based primarily on the morphology of the swim bladder.