Telling fish apart. At the Neosho National Fish Hatchery, USGS and USFWS staff determine the maturity and sex of pallid sturgeon broodstock using ultrasound and endoscope technology.

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Photo credit: © Natural History Collection / Alamy / Afripics
License: Licensed
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Keywords: animal, animals, archive, conservation, conserve, education, fauna, fish, flora, habitat, hatchery, history, image, learning, management, midwest, missouri, mo, national, natural, nature, neosho, nfh, photo, preservation, preserve, record, reference, refuge, service, states, sturgeon, united, usfws, wildlife, world