Recreational Crabbing: Robert Semmler

Fisheries Conservation Lab, Smithsonian Environmental Research Center
March 17, 2021
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Man stands in knee-deep water outside
Fisheries Conservation Lab, Smithsonian Environmental Research Center

Robert Semmler deploys field equipment to measure river herring, another migratory species the Fisheries Conservation Lab tracks. Credit: Fisheries Conservation Lab, Smithsonian Environmental Research Center

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