How does climate change affect marine habitat : Ocean warming

How does ocean warming affect fishes :

• Create both anoxic (waters that have no dissolved oxygen) and hypoxic (low oxygen concentration) zones
• Warming oceans can cause stress, decrease the range, increase diseases and even wipe out many commonly eaten fish
• Future ocean warming and acidification may drag down the commercial Arctic cod fishery by 2100
• Several species were noted to migrate poleward or to deeper waters to stay in their ideal temperature range
• Total number of open-water species in tropical marine zones declined by about half in the 40 years up to 2010
• Fish like sardines, pilchards and herring will become smaller in size and not be able to move to better environments
• As temperature increases, the demand for oxygen of many fish species will exceed their capacity to extract oxygen from the environment through their gills