World's largest ocean, extending from Antarctica to the Bering Strait; area 166,242,500 sq km/64,186,500 sq mi; greatest breadth 16,000 km/9,942 mi; length 11,000 km/6,835 mi; average depth 4,188 m/13,749 ft; greatest depth of any ocean is the found in the Mariana Trench, in the northwest Pacific, with a depth of 11,034 m/36,201 ft.