Citharus linguatula, the spotted flounder or Atlantic spotted flounder, is a species of fish in the Citharidae, a family of flounders. It is native to the eastern Atlantic Ocean (off northwest Africa) and the Mediterranean Sea, where it is found to a depth of 300 m (980 ft). This species grows to a total length of 30 cm (12 in) . It is of minor importance to local commercial fisheries. This species is the only known member of its monotypic genus.