How are boundaries understood between various oceans?
How arbitrary are the divisions between the oceans?
How many oceans are there on Earth? What are their names? What are the similarities and differences between the ocean and space? How can you differ a bay or gulf from a ocean? How big is specific ocean? How much water is there in the sea and ocean? What are the 5 oceans on earth? What is the sea? What are the 7 oceans in the world? How much water is there in the sea? What exactly is the difference between a sea and a bay? 2) Who do lakes, streams, and oceans differ from each other? What are blue ocean and red ocean strategies? What the difference between an ocean, a sea and a bay? What is sea? How many fishes there are in the sea? What landforms are found in the ocean basin? How were they created? How do they measure mean sea level?   How do they measure mean sea level? Shipping: Which are the important sea lanes in the world? What is the difference between seabed and ocean crust? Why is the water of seas and oceans salty? What abiotic factors are found in the ocean? Measurements: How far is a league, as in 20,000 leagues under the sea? What would have happened if the oceans were of fresh water? What if the oceans had fresh water from the beginning? How do the oceans affect climate change? What are those so many white spots that are seen from a plane on Atlantic ocean? What are geological and coastal features? What role does continental deflection play in ocean current? What is the lithological difference between oceanic and continental crust?