The region's sea and inland waters are rich sources of salt and fresh water fish and other marine products. It is one of the fish exporting regions of the country. There are substantial forest reserves in the interiors of the islands. Its mineral deposits include chromite, uranium(in Samar), gold, silver, manganese, magnesium, bronze, nickel, clay, coal, limestone, pyrite and sand and gravel. It has abundant geothermal energy and water resources to support the needs of medium and heavy industries.