Sea squirts (IMAGE) Xi'an Jiaotong-Liverpool University Caption The sea organisms Ascidiacea, also called sea squirts, contain substances called plasmalogens, which are vital to our body processes. Credit Prilfish Usage Restrictions Credit must be given to the creator. License CC BY 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.