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Preparing Niskin Bottles
Aaron Aunins and Katlin Adamczyk with the U.S. Geological Survey and Florida State University’s Lauren Rice (left to right) preparing the Niskin bottles on the CTD (conductivity, temperature, and depth) rosette to collect water samples. The CTD is an essential oceanographic tool used during the 2025 Aleutian Arc expedition to detect hydrothermal vents and collect water for analysis of environmental DNA (eDNA), the genetic material animals shed into the water.
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