Acidification poses a significant threat to marine ecosystems, primarily due to the increased absorption of carbon dioxide by the oceans, leading to lower pH levels. This change impacts calcifying organisms, such as coral reefs and shellfish, impairing their ability to build shells or skeletons, which can disrupt entire marine food webs and decrease biodiversity. Moreover, acidification can affect fish behavior, reproduction, and survival, thereby threatening the integrity of marine ecosystems and the livelihoods of communities that depend on them.