Azadinium spinosum (IMAGE) Helmholtz Association Caption Azadinium spinosum causes mussel poisoning by the production of azaspiracid (left: light microscopic image, right: SEM). Credit Urban Tillmann, Alfred Wegener Institute Usage Restrictions None 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.