the coral gets a low level of oxgyen from it prey
Ozone is both good and bad form of oxygen. It is good at atmosphere level and bad at ground level.
not your business
Yes
No, it is not.
Yes.
They don't need oxgyen but they need c2o which we exert and oxgyen is what plants exert
No, it is an element.
helium
gas
hydrogen and oxgyen
8