St. Martin's Island is a small island (area only 8 km2) in the northeastern part of the Bay of Bengal, about 9 km south of the tip of the Cox's Bazar-Teknaf peninsula, and forming the southernmost part of Bangladesh. There is a small adjoining island that is separated at high tide, called Chera Dwip. It is about 8 kilometres (5 miles) west of the northwest coast of Myanmar, at the mouth of the Naf River. The first settlement started 250 years ago by Arabian sailors who named the island 'Jazeera'. During British occupation the island was named St. Martin Island. During the First Anglo-Burmese War between the British and Burmese empires in 1824–1826, rival claims to the island were a major factor. The local names of the island are "Narikel jinjira" which means 'Coconut Island' in Bengali, and "Daruchini Dwip" which means "Cinnamon island" in Bengali. It is the only coral island in Bangladesh.It is also the southernmost part among Extreme Points of Bangladesh. Most of the island's approximately 3,700 inhabitants live primarily from fishing. The other staple crops are rice and coconut. Being very common on the island, algae are collected, dried, and exported to Myanmar. Between October and April, the fishermen from neighboring areas bring their caught fishes to the island's temporary wholesale market. However, imports of chicken, meat and other foods come in from the mainland Bangladesh and Myanmar (Burma). As the centre and the south are mainly farmland and makeshift huts, most of the permanent structures are around the far north. During the rainy season, because of the dangerous conditions on the Bay of Bengal, the inhabitants have no scope to go to the mainland (Teknaf) and their life can become dangerous. There is a hospital on the island, but in the past there has often been no doctor.