World Ocean that covers and encircles most of Earth. If viewed from the southern pole of Earth, the Atlantic, Indian, and Pacific Oceans can be seen as lobes extending northward from the Southern Ocean. Farther north, the Atlantic opens into the Arctic Ocean, which is connected to the Pacific by the Bering Strait, forming a continuous expanse of water. Plate tectonics, post-glacial rebound, and sea level rise continually change the coastline and structure of the world ocean. World Ocean The World Ocean or Global Ocean (colloquially the sea or the ocean) is the interconnected system of Earth's oceanic waters, and comprises the
Largest organisms living mammals. Since no scale can accommodate the whole body of a large whale, most whales have been weighed by parts. The following is a list of the heaviest wild land animals, which are all mammals. The African elephant is now listed as two species, the African bush elephant and the African forest elephant, as they are now generally considered to be two separate species. The largest tunicates are "Synoicum pulmonaria", found at depths of , and are up to 14 centimetres (6 in) in diameter. It is also present in the northwestern Atlantic Ocean, around the coasts of Greenland