Q: How many marginal seas border the Pacific Ocean?
A: 12
A marginal sea is an area of the ocean that is semi-enclosed by landmass, yet widely open to the ocean. In order of area from largest to smallest the 12 marginals seas of the Pacific are the Philippine Sea, the Coral Sea, the South China Sea, the Tasman Sea, the Bering Sea, the East China Sea, the Sea of Okhotsk, the Sea of Japan, the Yellow Sea, the Celebes Sea, the Sulu Sea, the Sea of Chiloé.
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