Melanoides nyassana is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Thiaridae.

It is endemic to Lake Malawi, where it is widespread.

[1] Melania truncatelliformis Bourguignat, 1889 may be a synonym of Melanoides nyassana.

[3] The IUCN Red List of Threatened Species treats the species as a synonym of Melanoides polymorpha.

This Thiaridae-related article is a stub.