The mud whiting, Sillago lutea, is a species of coastal marine fish in the smelt-whiting family Sillaginidae. The mud whiting was first described in 1985 and is currently known from the north west coast of Australia and the Indian coast. As its name suggests, mud whiting prefer muddy or silty substrates, and are commonly found in association with the banana prawn. Due to this relationship, Australian prawn trawlers take large quantities of the species, but it is currently not marketed.