1,329 Free Images of Freshwater River

rivers and streams biologists(usfws)employees(usfws)connecting people with nature plants biologist survey virginia riverbed aquatic environment

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-3

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

Aquatic invertebrate -1

Aquatic invertebrate -2

Fly fishing clinic on Hatchery Creek-1

Biologists sample pacific salmon

Biologist releases salmon-1

underwater fish

Nasal speculum inserted into a Eastern lampmussel

research science

Smallmouth bass-2

Biologist releases salmon-7

underwater fish

Biologist releases salmon-1

underwater fish

Biologist releases salmon-6

underwater fish

Biologist releases salmon-2

underwater fish

Family fishing, mother nets rainbow trout

Ohio River Islands biologist, Patricia Morrison, holds Purple Cat's

Crocodiles eye with flies

australia national

FWS employees surveying and assessing rivers and streams-3

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-9

FWS employees surveying and assessing rivers and streams-4

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-3

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

USFWS Fisheries workers releasing lake sturgeon

Juvenile mussels in a gridline Petri dish

equipment science

Slits on outer stand pipe create currents

equipment science

Syringes filled with clean water for harvesting glochidia

equipment science

Aquatic invertebrate

Aquatic invertebrate -3

Aquatic invertebrate larvae in wood and leaf case

Biologist extracting glochidia from the plain pocketbook

equipment science

Largemouth bass being poured through a net-2

equipment science

Aquatic invertebrate larvae in wood and leaf case -1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-3

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-4

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-3

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-1

landscape water

FWS employees surveying and assessing rivers and streams-2

landscape water

USFWS Fisheries crew in boat-8

Looking for the Line

wildlife animals

Aquatic invertebrate larvae in wood and leaf case -5

Shelf fungus-3

Aquatic invertebrate -1

arthropod water

Aquatic invertebrate-2

arthropod water

Mushrooms attached to tree

Aquatic invertebrate larvae in wood and leaf case -1

Biologist releases salmon-2

underwater fish

Plankton net on recirculating propagation system-1

equipment science

Excised gills being placed in the culture media

equipment science

Largemouth bass being poured through a net

equipment science

Culture plates under an inverted microscope

equipment science

Biologist releases salmon

Biologists sample pacific salmon-2

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-2

FWS employees surveying and assessing rivers and streams-1

Biologist inspects fish weir

Biologist releases salmon-6

Biologist inspects fish weir-3

Biologist releases salmon-2

Female brook floater-1

research science

Manual siphoning of juveniles from static aquaria

equipment science

PVC pipe and coupler used to form a filter cup

equipment science

Glochidia of the plain pocketbook attached to the gill filaments of a largemouth bass

research science

Nested sieves attached to the fish host tank outflow for collecting juvenile mussels

equipment science

Extracting conglutinates from the James spinymussel

Fly fishing clinic on Hatchery Creek-2

Family fishing, mother nets rainbow trout-14

Aquatic invertebrate -1

arthropod water

Shelf fungus-2

Aquatic invertebrate -3

Aquatic invertebrate larvae in wood and leaf case -2

Uniformed FWS employee with two girls fishing-1

USFWS Fisheries crew in boat-6

Winged Mapleleaf Mussel

wildlife animals

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

FWS employees surveying and assessing rivers and streams-1

Aquatic invertebrate larvae in wood and leaf case -1

Biologist releases salmon-2

Biologist inspects fish weir-2

Biologist releases salmon-5

Excision of the demibranchs for in vitro culture

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