The Bohai Sea is a marginal sea located in northeastern Asia, bordered by the northeastern coast of China. It is connected to the Yellow Sea to the south and is surrounded by several provinces, including Liaoning, Hebei, and Shandong. The sea plays a significant role in regional shipping and fishing activities. The Bohai Sea has a relatively shallow depth, with an average of about 18 meters. It is home to various marine species and supports important ecosystems. Additionally, the sea is influenced by the Yellow River, which flows into it, bringing nutrients and sediments that affect its water quality and marine life.