Lobophytum Coral (IMAGE) Penn State Caption A new study reveals that the microalgae that live within coral cells change how they take in other trace metals when iron is limited, which could have cascading effects on vital biological functions. Credit Todd LaJeunesse, Penn State Usage Restrictions Credit must be provided alongside image. 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.