The largest sea in the world is the Philippine Sea, covering an area of approximately 5 million square kilometers (around 2 million square miles). Located in the western Pacific Ocean, it is bordered by the Philippines to the west, Taiwan to the north, and the Mariana Islands to the east. The Philippine Sea is not only the largest sea by area but also holds significant geological and ecological importance, including a diverse range of marine life and deep-sea trenches such as the Mariana Trench. It plays a vital role in global weather patterns and the dynamics of ocean currents.