St. Martin Island- The only Coral Island of Bangladesh is located in the Bay of Bengal surrounded by huge black stone.

The total area of this tiny island is only 14 km and 20km distance from the mainland of Shahpari Island on the southern tip of Teknaf.

1st settlement started just 250 years ago by some Arabian Sailors and named as ‘Zajira’. Subsequent the local settlers named as Narikel Jinjira. During British occupation the island was named as St. Martin Island. The characteristic of 12km long sandy sea beach is very pleasant having with gentle slope. Crystal clean water with rich biodiversity and unpolluted nature play the vital role to attract the tourists. The southern trip of the island is forested by some mangrove species like Keya, Khalshi, Kirpa, Horgoza and Jhao. Planted trees are also there with coconut, battle nut , bamboo, mango and other local vegetation. There are now more than 6500 people permanently settled there and their main occupation is fishing. The marine life of the island is very rich with different type of sea fishes like Pamfret, Maccaral, Tona, Gruiter etc. There are also various type of shruips, lobstar, King crab and rare species of giant crab can be found in an ideal habitat. This island is specially attracted the natural scientists to be a safe refuge for hatching of different type of sea turtles like olive ridley turtle, Hocksbill turtle, leatherback turtle and loggerhead turtle.

The island is now accessible by newly introduced of regular Sea Truck everyday at 10 am and return by 3 pm along side with many private fishing trawlers.

There are only few 5/6 private tourist lodge and the only standard Hotel Prashad Paradise has opened up to accommodation the most enthusiastic tourists who ventured to cross the 20 km blue water of the Bay of Bengal bordering the south-eastern side by the Myanmar High Hill ranges and the turbulent waves of the Bay. But the natural surrounding of the remote island is considered as the paradise for the nature loving tourist who can enjoy the virgin coral beach and pass leisure time or go for snorkeling in the blue water. The brilliant sunrise and colorful sun set has no match any where in the world. To enjoy the moonlit might sitting on any black stone along side the beach will be life time experience for any tourist.

The adjacent small island Cheradeep is very attractive for rich marine life shells, pearl and corals.

It is about seven kilometer of Cox's Bazar and about nine square kilometer in area. The western side of the island is sandy and different kinds of shells are found on the beach. Off the northern part of the island, there are beds of windowpane oysters. During winter, fisherman set up temporary camps on the island and Dries Sea fishes, which they catch from Sea.