Rock Vomit -- <I>Didemnum vexillum</I> (IMAGE) Smithsonian Caption Didemnum vexillum was given the name "rock vomit" following its discovery in Sitka, Alaska, during a citizen science survey called the Bioblitz in June 2010. The Smithsonian Environmental Research Center has created an online public database to provide key information about the non-native marine species throughout the nation. Credit Image courtesy of Melissa Frey, Royal BC Museum, Canada Usage Restrictions Please include the 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.