Krusadai Island is an uninhabited island in the Gulf of Mannar situated south of Pamban Island. The island belongs to India and forms a part of the Gulf of Mannar Marine National Park.

• Marimuthu, N., Wilson, J.J. and Kumaraguru, A.K. 2010. Galaxea, J Coral Reef Studies, 12(2): 65-75 Reef status in the Mandapam group of Islands, Gulf of Mannar
• Krishnamoorthy Venkataraman; Chandrakasan Sivaperuman (2014). Marine Faunal Diversity in India: Taxonomy, Ecology and Conservation. ISBN 978-0-12-801962-7.