At a separation of 20 km from Rameshwaram around 4 km from Mandapam, Kurusadai Island is a uninhabited Island deceives the west of the Pamban Bridge between in the terrain and Pamban Island. Around 10,500 sq. kms of the ocean around here constitute a Marine Biosphere, a heaven for Marine Biologists and nature darlings. There are a lot of coral-reefs and fishes. You can likewise observe dolphins and ocean cows Dugong. A unique authorization from the Director of Fisheries, Chennai is required to visit this Island. This is outstanding amongst other spots to visit with relatives and friends and family.