Asia is bordered by over 30 seas**, marginal seas, and oceanic divisions—more than any other continent. This reflects its vast coastline (~62,800 km / 39,000 mi) and complex geography of peninsulas, archipelagos, and enclosed basins. The major seas include:
Note: The Arctic Ocean, Pacific Ocean, and Indian Ocean are oceans, not seas, but their marginal seas border Asia directly. The Caspian Sea is the world's largest inland body of water (lake), but its saline nature and size often place it in "seas bordering Asia" lists.
This dense concentration of seas makes Asia a global hub for marine biodiversity, fisheries, shipping lanes, and geopolitical complexity.