Elophila difflualis is a species of moth of the Crambidae family. It is found in South-East Asia, in Australia and La Réunion but has also be introduced to the United Kingdom.The wingspan is 11–13 mm for males and 13–18 mm for females.The larvae feed on Hydrocharitaceae (Valisneria sp.), Rosaceae (Synnema sp.), Alismataceae (Echinodorus sp.), Potamogetonaceae (Potamogeton sp.), Marsiliaceae (Marsilia sp.)