Wanderlust World Wanderlust World The Mediterranean Sea significantly exceeds Hudson Bay in surface area.
The Mediterranean is roughly twice the size of Hudson Bay. This difference reflects their distinct origins: the Mediterranean is a remnant of the ancient Tethys Ocean between continents, while Hudson Bay is a relatively shallow, geologically recent inland sea on the North American craton.
The Mediterranean's greater size also means larger volume, deeper average depth (1,500 m vs. 100 m), and more complex circulation patterns connecting to the Atlantic via the Strait of Gibraltar. Hudson Bay, by contrast, is largely frozen in winter and receives massive freshwater input from Canadian rivers.