Adult Acorn Worm (IMAGE) Marine Biological Laboratory Caption This is an adult acorn worm with its proboscis on the bottom right and tail on the top left. Credit A. Pani 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.