California mussel beds (IMAGE) University of California - San Diego Caption UC San Diego researchers have found that the shells of California mussels, a critical species found along the Pacific Coast, are weakening as a result of ocean acidification. Credit Roy Lab, UC San Diego Usage Restrictions Must be used in conjunction with PNAS paper on impacts of ocean acidification on California mussels. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.