CTD (IMAGE) Woods Hole Oceanographic Institution Caption A water sampler known as a conductivity, temperature, depth (CTD) rosette is deployed from the U.S. Coast Guard icebreaker Healy during a 2019 expedition to the Alaskan Arctic Ocean to study the presence of harmful algae and the conditions that promote their growth and spread Credit Photo ©Woods Hole Oceanographic Institution Usage Restrictions For use with proper photo caption and credit. 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.