Aethes margaritana, the silver coast conch, is a moth of the family Tortricidae. It was described by Haworth in 1811. It is found in most of Europe. The habitat consists of downland, waste ground and shingle beaches. The wingspan is 12–16 mm. Adults have a silky-white groundcolour with yellow-ochreous transverse markings. They are on wing from May to June and again from July to August in two generations per year.