The relationship between ocean acidification and marine life is critical, as increased carbon dioxide levels lead to lower pH levels in seawater. This acidification affects calcifying organisms, such as corals and shellfish, making it harder for them to create calcium carbonate structures. It also disrupts the physiological processes of various marine species, impacting growth and reproduction. The repercussions of ocean acidification threaten marine biodiversity and ecosystem services, necessitating research and protective measures to mitigate its impacts.