Sillago is one of three genera in the family Sillaginidae containing the smelt-whitings, and contains 29 species, making Sillago the only non-monotypic genus in the family. Distinguishing among Sillago species can be difficult, with many similar in appearance and colour, forcing the use of swim bladder morphology as a definitive feature. All whiti... Found on http://en.wikipedia.org/wiki/Sillago