The East China Sea is a marginal sea located in the western Pacific Ocean, bordered by several countries, including China, Japan, and Taiwan. It covers an area of approximately 1.25 million square kilometers and is known for its rich marine biodiversity and significant fishing grounds. This sea is also important for international shipping routes, connecting major ports in Shanghai and Nanjing to other parts of Asia. The East China Sea is home to various islands, including the Senkaku Islands, which are subject to territorial disputes among neighboring nations.