Chizumulu Island is the smaller of two inhabited islands in Lake Malawi/Lake Nyasa, the larger being the nearby Likoma island, which together make up the Likoma District. Both these islands lie just a few kilometres from Mozambique and are entirely surrounded by Mozambican territorial waters, but they belong to Malawi. They are therefore exclaves of Malawi. This came about because the islands were colonised by Anglican missionaries spreading east from Nyasaland, rather than by the Portuguese who colonised Mozambique.