Black sea urchins (IMAGE) University of Sydney Caption Black sea urchins in vents off the coast of Ischia, Italy. Credit Dr Shawna Foo/USYD. Usage Restrictions Only use with this story, with credit. License Original 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.