Kirk Sato, University of California - San Diego (IMAGE) University of California - San Diego Caption Researcher Kirk Sato evaluates the color and texture of sea urchin gonads. Credit © Jeff Ellen Usage Restrictions Credit as appropriate 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.