The oceans cover 71% of the surface of the earth.

After World War II, Egypt pressed for evacuation of British troops from the Suez Canal Zone, and in July 1956 President Nasser nationalized the canal, hoping to charge tolls that would pay for construction of a massive dam on the Nile River. In response, Israel invaded in late October, and British and French troops landed in early November, occupying the canal zone. Under Soviet, U.S., and U.N. pressure, Britain and France withdrew in December, and Israeli forces departed in March 1957. That month, Egypt took control of the canal and reopened it to commercial shipping.

Guantanamo Bay located in Cuba.

The Kiel canal joining Baltic Sea to the North Sea .

With an area of about 5.4 million square miles, The Arctic Ocean is about 1.5 times as big as the United States. It is bordered by Greenland, Canada, Norway, Alaska, and Russia. The average depth of the Arctic Ocean is 12,000 feet and it is 17,850 feet at its deepest point.

Nicaragua is planning to construct a rival to the Panama Canal to link the Pacific and Atlantic Oceans

Canada have 202,080 km (125,567 miles) of coastline. Canada is also the country with largest water area in the world, and the second largest country in the world.

The highest average salinity amongst the following seas is reported from Dead Sea.

Pacific Ocean holds almost 50% of total water on the planet.

The Dead Sea, is a salt lake bordered by Jordan to the east and Israel and Palestine to the west. Its surface and shores are 430.5 metres (1,412 ft) below sea level, Earth's lowest elevation on land. The Dead Sea is 304 m (997 ft) deep, the deepest hypersaline lake in the world. With a salinity of 342 g/kg, or 34.2%, (in 2011), it is 9.6 times as salty as the ocean, and one of the world's saltiest bodies of water. This salinity makes for a harsh environment in which plants and animals cannot flourish, hence its name. The Dead Sea is 50 kilometres (31 mi) long and 15 kilometres (9 mi) wide at its widest point. It lies in the Jordan Rift Valley and its main tributary is the Jordan River.