Calcium Distribution in Sea Urchin Larvae (IMAGE) Weizmann Institute of Science Caption The green fluorescent label maps the distribution of calcium in sea urchin larvae. The label shows the elongated mineralized spicules and vesicles with large amounts of calcium. Credit Weizmann Institute of Science 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.