Since the dawn of the Industrial Revolution, the world's oceans have absorbed approximately thirty percent of anthropogenic carbon dioxide emissions, acting as a massive planetary heat and carbon sink. While this oceanic uptake has moderated atmospheric warming, it has simultaneously triggered profound chemical perturbations in seawater, a phenomenon termed ocean acidification. When carbon dioxide dissolves in water, it forms carbonic acid, which rapidly dissociates to release excess hydrogen ions. These surplus ions chemically bind with free carbonate ions, drastically reducing the saturation state of calcium carbonate throughout upper marine layers. This chemical depletion strikes directly at calcifying marine organisms, including reef-building corals, pteropods, and shellfish, which rely on ambient carbonate ions to construct their protective shells and skeletal structures. Laboratory assays demonstrate that under elevated acidity, larval shells dissolve prematurely, impairing survival rates and reproductive fecundity. Because microscopic pteropods form the indispensable nutritional base for commercial salmon, herring, and baleen whales, persistent acidification threatens to destabilize global marine food webs and jeopardize multi-billion-dollar coastal fisheries.