The Nuyts Archipelago, including the Isles of St Francis, is an island group in South Australia consisting of mainly small and mostly granitic islands lying off Ceduna, South Australia, at the eastern end of the Great Australian Bight and the north-western coast of the Eyre Peninsula. Many of the islands support extensive colonies of short-tailed shearwaters, or muttonbirds, while its smaller islets and reefs provide breeding sites for Australian sea lions.