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The acidic waters from the CO2 seeps can dissolve shells and also make it harder for shells to grow in the first place.
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Dissolving Shell

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Acidic waters are also able to completely dissolve coral skeletons.
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Dissolving Coral Skeleton in Acidic Waters

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Researchers can study ocean acidification in the lab by rearing organisms (here, Lophelia deep-sea corals) in seawater with variable pH and measuring if they grow, eat, breathe, reproduce, or develop differently.
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Studying Acidification in the Lab

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Intense volcanic CO2 vents in Ili Ili Bua Bua, Normanby Island, Papua New Guinea.
Slideshow

Will Coral Reefs Survive Acidification?

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A bluefin trevally swims in Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument.
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Two Views of Coral Reefs: Thriving and Threatened

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A pair of sea butterflies float in the Arctic ocean.
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Searching for the Ocean Acidification Signal

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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
Overview

Ocean Acidification

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Forams are tiny single-celled organisms.
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Trials and Tribulations with Contamination

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This orange boring sponge (Cliona varians) overgrows several coral species at Panama's Smithsonian Tropical Studies Institute.
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Ocean Acidification Excites Boring Sponges

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A graph showing rising levels of CO2 in the atmosphere over time.
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Ocean Acidification Graph

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Tiny organisms found on ARMS
Article

From Field to Lab: How Carbon Seeps Provide a Chance to See Future Impacts of Ocean Acidification

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A diver cares for the reef by cleaning up discarded fishing gear and garbage.
Article

Reef Rescue: Protect Coral Reefs with Your Actions

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