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Higher CO2 Harms All Marine Life From Corals and Clams to Fish

Rising levels of carbon dioxide are harming all forms of marine life because the oceans are acidifying as they absorb the gas, German researchers found.

Mollusks, corals and a class of creatures called echinoderms that includes starfish and sea urchins are the worst affected by the uptake of CO2 by the seas, according to a study today in the journal Nature Climate Change by researchers at the Alfred Wegener Institute in Bremerhaven. The gas forms carbonic acid when it dissolves in the oceans, lowering their pH level.