Actually, I thought that most of the worlds oxygen supply came from kelp forests,not algae or trees, which would flourish if there was that much more water, and fish species that ate them began to die off, and that would mean that the atmosphere might contain an INCREASED amount of oxygen, not decreased.
You aren't symmetrical. You. Aren't. Symmetrical.
YOU! AREN'T! SYMMETRICAL!?!?!?!?!?!
DDDDDDDDIIIIIIIIIIIIIIIEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!