Water Testing Image (image) University of Houston Share Print E-Mail Caption A crowd of pond water protists overlook an ostracod (seed shrimp) having a buffet of spirogyra (long string-like chlrophyll structure). Microscopic image of pond water taken in a cuvette on-site with a smartphone. Credit University of Houston Usage Restrictions None Share Print E-Mail 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.