Sponge Pumping Seawater (IMAGE) University of Hawaii at Manoa Caption The active pumping of seawater by the sponge Mycale grandis can be seen in distinct jets of Fluorescein dye expelled by the sponge. Credit Joy Leilei Shih Usage Restrictions Image may be used with appropriate caption and credit information. 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.