Moyenne Island is a small island (9.9 ha or 24 acres) in the Sainte Anne Marine National Park off the north coast of Mahé, Seychelles. Since the 1970s onwards, it has been a flora and fauna reserve. From 1915 until the 1960s, the island was abandoned until its purchase by Brendon Grimshaw for £8,000 (about 10,000 dollars). He was a former newspaper editor, originally from Dewsbury in Yorkshire, England.