The Bay of Bengal is the triangular, northeastern part of the Indian Ocean. The bay is bordered by India and Sri Lanka to the west, Bangladesh to the north and Myanmar (formerly known as Burma), Andaman and Nicobar Islands to the east.
According to the International Hydrographic Organization, the Bay of Bengal's limits are defined in the east by a line running from Cape Negrais in Burma through the larger islands of the Andaman group, as far as a point in Little Andaman Island, then along the southwest limit of the Burma Sea. To the south, it is bounded by Adam's Bridge (between India and Ceylon) and from the southern extreme of Dondra Head to the north point of Poeloe Bras. The Bay is approximately 1,000 miles wide, with an average depth of 8,500 feet.