CHEDUBA or an island in the Bay of Bengal, situated 1 o m. from the coast of Arakan, between 28° 40' and 18° 56' N., and between 93° and 50' E. It forms part of the Kyaukpyu district of Arakan. It extends about 20 m. in length from north to south, and 17 m. from east to west, and its area of 220 sq.m. supports a population of nearly 30,000. The channel between the island and the mainland is navigable for boats, but not for large vessels. The surface of the interior is richly diversified by hill and dale, and in the southern portion some of the heights exceed a thousand feet in elevation. There are various indications of former volcanic activity, and along the coast are earthy cones covered with green-sward, from which issue springs of muddy water emitting bubbles of gas. Copper, iron and silver ore have been discovered; but the island is chiefly noted for its petroleum wells. The inhabitants of the island are mainly Maghs. Cheduba fell to the Burmese in the latter part of the 18th century, and was taken by the British in 1824.