In recent years, ocean acidification, along with global warming, has been recognized as a critical environmental stressor on a global scale, and understanding its current situation and effects on marine organisms and ecosystems is an issue of utmost importance. In order to quantitatively assess the marine organism's response to ocean acidification and the compound marine environmental other stressors of warming temperature and deoxygenation, resulting from global warming, there is an urgent need to focus monitoring and observation efforts on the open ocean and coastal areas, especially in those areas where acidification is of heightened concern.