Uploaded April 2016 | Updated September 2026, 7 hours ago

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This demonstration illustrates why calcifiers (organisms that build their shells and external skeletons from calcium carbonate) are so vulnerable to ocean acidification. Download the companion .pdf file, ’Shells on Acid Demonstration Protocol’, from Washington Sea Grant's Ocean Acidification webpage:

https://wsg.washington.edu/our-northwest/ocean-acidification/