This is true in a certain nonspecialized sense but thanks to thermoclines, pynoclines, haloclines, and various other physical phenomena that basically amount to scientific voodoo, there are parts of the ocean don't actually intermingle with each other despite being ostensibly physically connected. Thus the ocean naturally divides itself into various separated regions regardless of what we think about it.
this post was submitted on 22 Mar 2026
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I did a clear bottom kayak tour in St Kitts some years ago. There was a part that we paddled from the Caribbean through part of the Atlantic. We were warned that as we crossed the wind and waves would pick up, and boy did they. It was like a literal line that separated the two. I'd imagine it's like that with other major bodies of water too.
Also, there's things like the Mediterranean that is much saltier than the Atlantic, despite plenty of water flowing back and forth. There's sealife that's only found in the Med, like the Mediterranean monk seal.
I guess this is clearly a matter of definition then. Is it one body of water (yes), or can the water be divided based on other characteristics (it clearly can), and is it beneficial to separate the water into different parts (clearly also to some benefit). We just gotta unite regarding how to divide the oceans (also already done). 😄
Your desire to unite over how to divide isn't shared by everyone though, so we're divided over whether to unite to divide 😁
Not true. They intermingle, just not as much as other parts of the ocean.
Borders are made up on land and sea!
What about Billy?
He got tough, got into his car, and got going?
You can literally see where the Atlantic and Pacific meet at Cape Horn