If "under the ocean" or "under the sea" means underwater, under the surface. Then what should we say to point to something under the "under the ocean, sea"?

I was thinking of:

  • Under the ocean floor.
  • Under the sea floor.

Also, is undersea or underocean possible based on that underground is.


You could say several things:

  • Under the ocean floor
  • Under the sea floor (or seafloor)
  • Beneath the bottom of the ocean

There are technical terms like "lithosphere", but that's probably not what you want. You could also refer to the Earth's crust directly.

"Undersea" is a word. I've never heard anyone say "underocean",

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  • 2
    Also, beneath the ocean floor. – Epanoui Mar 29 '17 at 23:09
  • 1
    Yes, you can mix and match. – Adam Haun Mar 30 '17 at 16:49

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