Tubeworms at Hydrothermal Vent (IMAGE) University of Oregon Caption Vestimentiferan tubeworms Riftia pachyptila occur near deep sea hydrothermal vents found along the East Pacific Rise. Sites of intense hydrothermal activity, and their related ecosystems, rely upon upwelling magma from Earth's mantle for their energy. Credit Dr. James Childress, UCSB Usage Restrictions None 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.