Greg Ruiz in San Francisco (IMAGE) Smithsonian Caption Greg Ruiz, a marine invasions biologist with the Smithsonian, samples invertebrates in San Francisco Bay. Credit Ross Whippo/Smithsonian Environmental Research Center Usage Restrictions This image may be used for non-commercial purposes provided attribution is included, in accordance with the Smithsonian terms of use (https://www.si.edu/termsofuse) 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.