PAH changes (IMAGE) Toho University Caption Changes in the concentration of polycyclic aromatic hydrocarbons in fecal pellets of Marphysa sp. E and reduced mud. Credit Atsuko Nishigaki Usage Restrictions None License Original 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.