The term 'Antarctic Sea' refers to the body of water located in the Southern Hemisphere, south of the Antarctic Circle. It is surrounded by the continent of Antarctica and is home to a variety of marine life. The two crossword solutions for this term are 'Ross' (4 letters) and 'POLAR' (5 letters). Ross is a reference to James Clark Ross, a British explorer who was the first to reach the North Magnetic Pole in 1831 and the South Magnetic Pole in 1841. POLAR is a reference to the Arctic and Antarctic regions, which are both located near the poles of the Earth.