[expatpat]

And you believe that alarmist nonsense? The ocean is not acidified, except in Jeremy's head. The ocean is still alkaline, with pH well above 7.0, which is neutral. Coral grew strongly in previous periods, when the temperature was significantly warmer than today.

Even if temperatures rise significantly, which is probably not going to happen, fish etc. will just move a little further North as the ocean warms very slowly (its time constant is over 1000 years).

[cogitator]

The ocean is not acidified, except in Jeremy's head. The ocean is still alkaline, with pH well above 7.0, which is neutral.

Surface ocean pH has declined about 0.1 pH units (globally) since accurate measurements commenced. That's "acidification", not "acidified".