If you mean the most narrow navigable "passage" then it's the Panama Canal, given the Pacific Ocean flows into the canal, then exits into the Caribbean Sea, which flows into the Atlantic.
If you mean a natural "opening," then it's the "Drake Passage." From one source: "This opening connects the Pacific and Atlantic oceans and encircles Antarctica in a ring of cool water known as the Antarctic Circumpolar Current" (See related links below).
The Panama Canal is a man made body of water that connects the Atlantic Ocean with the Pacific Ocean.
That would be the Atlantic Ocean. Pacific is on the other side, by California. Pacific
the Atlantic Ocean is between N/S America and Europe/Africa. The Arctic ocean surrounds the north pole.
Atlantic ocean is in between Africa, Europe, the Southern Ocean, and the Western Hemisphere. Pacific ocean is between the Southern Ocean, Asia, Australia, and the Western Hemisphere
The Pacific Ocean
The Panama Canal connects the Atlantic and Pacific Oceans.
The four ocean's of the earth are : * The Indian Ocean, * The Atlantic Ocean, * The Pacific Ocean, * The Arctic Ocean
Atlantic ocean has a lower average temperature
They are different oceans.
The Atlantic and Pacific Ocean. (Apex)
Southern ocean, Pacific ocean, and the Atlantic ocean.
The Caribbean Sea, the Atlantic Ocean and the Pacific Ocean border South America.