Water Sample (IMAGE) University of Washington Caption Brooks Miner extracts Daphnia from among the zooplankton in a water sample from a pond in Olympic National Park. Credit Anna Coogan Usage Restrictions News use only. 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.