Puducherry, a French colonial settlement in India until 1954, is a Union Territory created under seventh amendment of Indian constitution with an area of 483 sq. km. The four regions of the Union Territory have a coastline of 45 km with 675 of inshore waters, 1.347 hectares of inland water and 800 ha of brackish water. The three enclaves of U>T> of Puducherry are located in coastal regions of bay of Bengal and Arabian Sea. Puducherry and Karaikal are located in coastal regions of Bay of Bengal and Mahe region is situated on the estuary of the Mayyazhi River and Arabian Sea. Yanam region is located apart from the coastal areas nestled with Andhra Pradesh.