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Purple Cat's Paw mussel in biologists hand-1

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Lower Columbia River Fish Health Center laboratory-1

Service employee collecting Fall Chinook salmon eggs-1

Lower Columbia River Fish Health Center scientists-2

Biologist with gulf sturgeon-1

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Scientists at Lower Columbia River Fish Health Center

Scientist at Lower Columbia River Fish Health Center-6

Floating basket-2

Biologist with gulf sturgeon on the Choctawhatchee River

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Scientist at Lower Columbia River Fish Health Center

Purple Cat's Paw mussel in biologists hand

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Lower Columbia River Fish Health Center laboratory

Lower Columbia River Fish Health Center laboratory fish sampling

Biologist with gulf sturgeon-1

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Lower Columbia River Fish Health Center scientists

Biologist with floating basket

Service scientist at Lower Columbia River Fish Health Center-2

Biologist with gulf sturgeon on the Choctawhatchee River-2

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Lower Columbia River Fish Health Center laboratory-1

Lower Columbia River Fish Health Center laboratory fish sampling-1

Service scientist

Crayfish propagation-1

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Staff at Warm Springs Hatchery checking nets for channel catfish-1

Service scientist at Lower Columbia River Fish Health Center-1

Scuba diver looks for Purple Cat's Paw Mussels in the Ohio River-3

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FWS biologist inspects the growth of crayfish-2

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Biologist with gulf sturgeon on the Choctawhatchee River-2

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Subsamples on a dry Petri dish

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Biologist with gulf sturgeon-2

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Close-up of Alewife used as bait for lake sturgeon-2

Gulf sturgeon-2

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USFWS fisheries worker prepares to insert transmitter in lake sturgeon

Biologists on Choctawhatchee River -3

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Service scientist conducts ELISA tests-1

Lower Columbia River Fish Health Center laboratory-2

Biologist with gulf sturgeon-2

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Service scientist at Lower Columbia River Fish Health Center-1

Biologists on Choctawhatchee River -1

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Biologist with gulf sturgeon on the Choctawhatchee River-2

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Lower Columbia River Fish Health Center laboratory-2

Biologists sample pacific salmon-2

FWS biologist holds a purple bankclimber freshwater mussel-3

Service employee collecting Fall Chinook salmon eggs

Wildlife biologist in the field

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Service scientist conducts ELISA tests-1

Service scientist at Lower Columbia River Fish Health Center

Capative propagation of the purple bankclimber mussel-2

Researcher examines a freshwater mussel

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Biologist with gulf sturgeon on the Choctawhatchee River-1

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Lower Columbia River Fish Health Center scientist

Biologist with gulf sturgeon on the Choctawhatchee River-1

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