The South China Sea is a marginal sea of the Western Pacific Ocean. It is the biggest sea by size. It is bounded in the north by the shores of South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan.
The Gulf of Guinea is the northeastern most part of the tropical Atlantic Ocean. In this Gulf, there happens the intersection of the Equator and the Prime Meridian (zero degree latitude and longitude).