Explanation:

Distribution of coral Reefs in India

Palk Bay

Coral reefs on the Tamil Nadu coast are located in Palk Bay near Rameswaram and in the Gulf of Mannar. Palk Bay is separated from the gulf of Manner by Mandapam peninsula and Rameswaram island. The Gulf of Mannar

The Gulf of Mannar reefs on the other hand are developed around a chain of 21 islands that lie along the 140 km stretch between Tuticorin and Rameswaram (Krishnamurthy, 1987; Kumaraguru, 1997).

Andaman and Nicobar Group of Islands.

The Andaman and Nicobar group of Islands are located in the SE of the Bay of Bengal, between 6°-14° N lat and 91 °-94° E longitude. They are the emerged part of a mountain chain and lie on a ridge which extends southward from the Irrawaddy delta area of Burma, continuing the trend of the Arakan Yoma range.
The Gulf of Kutch

The Gulf of Kutch located at 22°15'-23°40' N Latitude and 68°20'-70°40' East Longitude, is one of the indentations found on the northern side of the Saurashtra Peninsula. It has and area of approximately 7350 sq km. The Gulf which is aligned approximately E-W is about 170 km long and 75 km wide at the mouth, after narrowing down abruptly at a longitude of 72° 20' it gets divided into three major creek systems at the island of Satsaida bet. The southern shore is fringed by numerous live and some dead coral reefs, islands and extensive mud flats, that dry at low tide. In contrast the northern coast is fringed by tidal flats only.

The Lakshadweep Islands

The Lakshadweep islands lie scattered in the Arabian sea about 225 to 450 km from the Kerala coast. Geographically, the islands lie between 8°N - 12°3'N lat. And 71 °E- 74°E longitude. The islands consist of coral formations built up on the Laccadive-Chagos submarine ridge rising steeply from a depth of about 1500 m to 4000 m off the "west coast of India