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Greetings from sunny St. John, U.S. Virgin Islands! NOAA's National Centers for Coastal Ocean Science scientists, in cooperation with NPS and USGS, completedthe second phase of a study to support management of fishes and habitats. Over30 hydrophones were planted to listen for the passage of fishes with surgicallyimplanted sonic tags. L-R: Marc Monaco and Alan Friedlander. (Image credit: NOAA 200th Anniversary Postcards from the Field)