... becausethey lie at the edges (margins) of the ocean. Gulfs and baysare alternative names for areas of seawater partly enclosedby land, as in the case of the Gulf of Mexico or the Bay of Bengal.Parts ... any further. The Pacific Ocean The Pacific Ocean is the world’s largest expanse of sea, cover-ing nearly one-third of Earth s surface—more than 16 times the area of the 50 U.S. states. The Pacific ... boundary of the Southern Ocean is a feature called the AntarcticGEOGRAPHY OF THE OCEANS 21 thousand). In addition, the Baltic Sea, unlike the North Sea,is separated from the warming effect of the...