Explanation:

The Palk Strait: It is a strait between the India state of Tamil Nadu and to the Jaffna District which is a part of the Northern Province connecting the island nation of Sri Lanka. It provides connectivity with the Bay of Bengal in the northeast with that of Palk Bay in the southwest. The strait is 53-82 kilometres (33-51 mi) wide. Various rivers flow into it, comprising the Vaigai River of Tamil Nadu. The strait is named after Robert Palk, who was a governor of Madras (from 1755–1763) during the Company Raj period. The distinctive feature around Palk Strait is that the waves surrounding it, to its north and south, are of high contrast. To the north, the waves of the Bay of Bengal have majority swelled  waves while that on the south, in Palk Bay, are majorly the sea waves. 

Palk Bay: It is covered at its southern end with a chain of low islands and reef shoals that are combinedly called Adam's Bridge; it has historically been recognised in the Hindu Mythology as the "Ram Setu," i.e. The Bridge of Rama. This chain expands between the Dhanushkodi on Pamban Island (also called as Rameswaram Island) in Tamil Nadu and Mannar Island in Sri Lanka. The island of Rameswaram is connected to the Indian mainland by that with the Pamban Bridge. Despite being a sea dominated area, the enormous wave heights in Palk Bay regions are comparatively low. The average significant wave height in the Palk Bay, near to the Adam's Bridge is approx. 0.5m.

Situated on the southeastern tip of the subcontinent, the Gulf of Mannar is considered to harbour over 3,600 species of the flora and fauna, making it one of the richest coastal regions in Asia. One hundred seventeen hard coral species have been recorded/documented in the Gulf of Mannar. Sea turtles are repeat visitors to the gulf as are sharks, dugongs, and dolphins. However, the combined impacts of 47 villages, with a total population of around 50,000 has conveyed that overharvesting of marine species has resulted in a problem. The dropdown of the fish populations has been accompanied by the reducing numbers of pearl oyster, gorgonian coral, and of acorn worm.