Read here. We have written on this subject before, which has always sounded too bizarre to us. It appears that scientists are coming to the same conclusion, even those who at first claimed ocean acidification was an imminent disaster for all ocean life.
"That is to say, it will not be one grand catastrophe for earth's calcifying marine life [from ocean acidification]. Rather, there may well be both "winners and losers," as they put it, with the vast bulk of species likely sandwiched somewhere in between these two extremes. In fact, when real-world evidence for rapid adaptation and evolution is considered, the future actually looks quite bright for earth's aquatic (and terrestrial) life."