I have no clue if its a molecule or what, I just meant that water is H2O. So water has to have a certain amount of oxygen, yet the article is supposedly about the ocean running out of oxygen. Hence my question - is water no longer made up of H2O?
The article is talking about oxygen available to living organisms. The oxygen "locked" into H2O is not accessible (for "breathing" purposes) to fish, dolphins, or humans. Normally, water contains a certain quantity of dissolved oxygen (like saltwater contains dissolved salt).
Pure H2O, containing no dissolved oxygen, is called anoxic. The bottom of, e.g., the Black Sea is an anoxic zone - meaning that only primitive organisms like anaerobic bacteria can thrive there.
Regards,