The Andaman Sea or Burma Sea is a body of water to the southeast of the Bay of Bengal, south of Myanmar, west of Thailand and east of the Andaman Islands; it is part of the Indian Ocean. It is roughly 1,200 kilometres (750 mi) (north-south) and 650 kilometres (400 mi) wide (east-west), with an area of 797,700 square kilometres (308,000 sq mi). Its average depth is 870 metres (2,854 ft), and the maximum depth is 3,777 metres (12,392 ft).
Ocean Floor Tectonics
Running in a rough north-south line on the seabed of the Andaman Sea is the boundary between two tectonic plates, the Burma plate and the Sunda Plate. These plates (or microplates) are believed to have formerly been part of the larger Eurasian Plate, but were formed when transform fault activity intensified as the Indian Plate began its substantive collision with the Eurasian continent.
As a result, a back-arc basin centre was created, which began to form the marginal basin which would become the Andaman Sea, the current stages of which commenced approximately 3-4 million years ago[citation needed](Ma).

Tarutao National Park

Tarutao National Park is Thailand's first. Famous in history. And the beauty of nature. Located in Andaman Sea. Stool from the city about 40 kilometers from the coast and the port entrance Baton Bora 22 kilometers north bound vessel registered Islands National Park. Seaboard south of border between Thailand and Malaysia Federation. Area of the island and the sea together approximately 1,490 square kilometers. Consists of 51 small islands, large islands are 7 large islands, including Koh Tao Island . Ekaata model guiding the island Baton Hli precisely measure color and Ibis Island is divided into 2 large islands, is some kiln Ekaata model. Islands and the Army - Japan. Has been declared a National Park on April 19, 2517 and received praise from the organization UNESCO in 2525 as the Year of Asian heritage (ASEAN Heritage Parks and Reserves) time for travel on. during the month from November to April.