The world's largest sea is the Philippine Sea, which covers an area of approximately 5 million square kilometers. It is situated in the western Pacific Ocean and is bounded by the Philippines to the west, Taiwan to the north, and various smaller islands. The Philippine Sea is known for its rich biodiversity and significant marine ecosystems, including coral reefs and deep-sea trenches. Additionally, it serves as a vital route for international shipping and trade. The sea is also subject to geological activity due to the presence of tectonic plate boundaries, making it an area of interest for scientific research.