Silver eels collected in Shenandoah River to be radio tagged for a tracking study. American eels begin sexual differentiation at a length of about 8 to 10 inches and, depending on eel density, become male or female silver eels.
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This image was originally posted to Flickr by U. S. Fish and Wildlife Service - Northeast Region at https://flickr.com/photos/43322816@N08/6144449190. It was reviewed on 19 February 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.