The paleorecord confirms that marine biodiversity has been vulnerable to climate warming both globally and regionally  . In extreme cases of warming , marine mass extinctions occurred in the geological past, and there may be a relationship between warming magnitude and extinction toll  . A combination of warming and spreading anoxia caused marine extinctions in ancient episodes of rapid climate warming  . The role of ocean acidification in ancient extinctions is yet to be resolved  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report