Researchers examining yellow perch specimens from the Choptank river, Severna Park, Maryland, USA.

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Photo credit: © Edwin Remsberg / Alamy / Afripics
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Keywords: creek, dissect, examination, examine, fish, graduate, lab, laboratory, park, perch, phd, reproduction, research, researching, river, scientific, severna, specimen, student, study, toxicologist, watershed, yellow