POSIDONIA OCEANICA (IMAGE) University of Barcelona Caption In the grasslands, the plastics are incorporated to agglomerates of natural fiber with a ball shape (aegagropila or Posidonia Neptune balls). Credit UNIVERSITY OF BARCELONA Usage Restrictions The 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.