The Mamba South gas field is a supergiant natural gas field located offshore the Cabo Delgado Province, in the Rovuma Basin of Mozambique, in Offshore Area 4. Discovered in October 2011 by Italian company Eni, it is one of the largest natural gas fields in the world, with estimated reserves of up to 15 trillion ft<sup>3</sup> (424.75 km<sup>3</sup>), equivalent to 2 bboe.