Martin Island is a small coral island about 10 km (6mi) southwest of the southern tip of the mainland with beaches fringed with coconut palms and bountiful marine life. There is nothing more strenuous to do here than soak up the rays, but it is a clean and peaceful place. It is possible to walk around the island in a day because it measures only 8 sq km (3 sq mi), shrinking to about 5 sq km (2 sq mi) during high tide. Most of island's 5,500 inhabitants live primarily from fishing, and between October and April fisher people from neighboring areas bring their catch to the island's temporary wholesale market, a picturesque sight, which you can see on tours to Bangladesh.