Sea Urchins Prepared to Settle (image) University of California - Davis Caption Turbulence triggers transformation of sea urchin larvae into a state ready to settle down on rocks in response to a chemical signal, researchers have found. These larvae have just begun to transform. Credit Brian Gaylord/UC Davis Usage Restrictions May be used with credit. 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.