Open ocean oxygen minimum zones  are expanding in the North Atlantic, the North Pacific California Current and tropical oceans due to warming waters, stratification and changes in precipitation  . Hypoxic events along coasts, which are partially influenced by climate change, have been documented for all three countries, with events more prevalent on the east coast and around the Gulf of Mexico due to a regional oceanography dominated by rivers and estuaries carrying land-based nutrients . Hypoxia has directly caused large mortality events for fish and crabs in US estuaries in the Northwest Atlantic , Northeast Pacific  and the Gulf of Mexico . The OMZs and hypoxic events are projected to increase over the next century and may limit where fish can move  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report