[6] Sulu Sea is also where the Tubbataha Reef National Marine Park, one of the World Heritage Sites is located.

The sea's surface area is 260,000 square kilometers (100,000 sq mi).

[8] The Pacific Ocean flows into Sulu Sea in northern Mindanao and between Sangihe talaud Archipelago, North Sulawesi.

[9] The International Hydrographic Organization (IHO) defines the Sulu Sea as being one of the waters of the East Indian Archipelago.

The Southwest coast of Mindoro to Buruncan Point, its Southern extreme, thence a line through Semirara and Caluya Islands to Nasog Point (11°53′N 121°53′E / 11.883°N 121.883°E / 11.883; 121.883) the Northwestern extreme of Panay, along the West and Southeast coast of that island to Tagubanhan Island (11°08′N 123°07′E / 11.133°N 123.117°E / 11.133; 123.117), thence a line to the Northern extreme of Negros and down the West coast to Siaton Point, its Southern extreme, thence across to Tagolo Point (8°44′N 123°22′E / 8.733°N 123.367°E / 8.733; 123.367), Mindanao.