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Hunting for pteropods

Light Work

Aleck Wang, Amy Maas, Gareth Lawson, and Alex Bergan (left to right) ventured out on WHOI's coastal research vessel Tioga this fall to study changes in the marine environment of the Gulf of Maine as a result of decreasing ocean pH. During the trip, they took water samples and gathered temperature, salinity and other data using the CTD rosette in the background, then paired that information with observations of pteropods from different depths. Here, they are looking for the rice-grain-sized animals in a tray—a task made more difficult by the fading daylight and choppy seas. (Photo by Peter Wiebe, Woods Hole Oceanographic Institution)

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