Gulf of Mannar: - It spans between the northwest coast of Sri Lanka and the southeast coast of India.
 - It is a part of the Laccadive Sea of the Indian Ocean.
 - It encompasses 21 islands.
 - It is bounded to the northeast by Rameswaram (island), Adam’s (Rama’s) Bridge (a chain of shoals), and Mannar Island.
 - It receives several rivers, including the Tambraparni (India) and the Aruvi (Sri Lanka).
 - The port of Tuticorin is on the Indian coast. 
 - The gulf is noted for its pearl banks and sacred chank (a gastropod mollusk).
 
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