Acoustic receiver and tag

Two images, one shower the acoustic receiver being prepared and another showing the acoustic tag reader.

Photo By/Credit

Jessica Collier/USFWS

Media Usage Rights/License

Public Domain

Image

Left: An acoustic receiver is prepped to go in the Potomac River below Dam №4, Right: An acoustic tag is scanned to record its individual number — together the receivers and tags allow scientists to track American Eel in the River.