Tubeworm Larva (IMAGE) Penn State Caption Riftia pachyptila tubeworm larva, about 200 micrometers large. Credit Andrea D. Nussbaumer, Charles R. Fisher and Monika Bright 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.