Warm water doesn’t hold as much oxygen as cold water and this may have effected the Oar and other deep sea life’s ability to survive.
Worse still, the truly gargantuan quantities of methane at the bottom of all the oceans stays at the bottom because cold water keeps it there. When, not if, it starts to come to the surface we are completely – for lack of a better word – fucked. Climate Change will go through the roof (and then some). At that point the planet Venus will probably be more hospitable to life!.
We are in uncharted territory with our terra-forming of earth.