Thaumarchaeota archaea (image) University of Washington Share Print E-Mail Caption The study looked at Thaumarchaeota archaea, which are found throughout the world's oceans. These single-celled organisms have one membrane sac that encloses their bodies. This organism, used in the study, was collected from a tropical-water tank at the Seattle Aquarium. Credit University of Washington Usage Restrictions With credit 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.