Acorn Worm Triptych (IMAGE) Stanford University Caption Schizocardium californicum as a larva, juvenile and adult. In the larval stage, S. californicum is little more than a swimming head. Credit Paul Gonzalez and Chris Patton, Hopkins Marine Statio Usage Restrictions Image may only be used with appropriate caption or credit 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.