In OMZ regions , benthic species distributions , abundance and composition of demersal fishes in canyons  and deep-pelagic zooplankton  follow oxygen gradients, indicating that deep-sea biodiversity and ecosystem structure will be impacted by extension of hypoxic areas . Fossil records show benthic population collapse and turnover when oxygen ranged from oxic to mildly or severely hypoxic . Regional extirpations among cold-water corals in the paleorecord were associated with substantial declines in oxygen, coincident with abrupt warming and altered properties of intermediate water-masses . Despite mortality and functional impacts from low oxygen concentrations observed in aquaria , recent observations of the deep-water coral D. pertusum suggest adaptive capacity to hypoxia among specimens from OMZ regions that are highly productive  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report