FKt240412-20240419-Filtration-Ingle-4358 (IMAGE) Schmidt Ocean Institute Caption A filter now containing microbes is removed from one of the water filters on the CTD rosette. "CTD" stands for conductivity, temperature, and depth, and refers to a package of electronic devices used to detect how the conductivity and temperature of water changes relative to depth. Credit Alex Ingle / Schmidt Ocean Institute Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. Adaptations must be shared under the same terms. License CC BY-NC-SA 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.