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Scientist and biologist hydro-biologist takes water samples for analysis.
Close-up scientist hand with a white PPE suit and nitrile gloves collect sample waste water into a flask for laboratory water analysis, industrial and environmental concept
Chestnut goby Chromogobius quadrivittatus (Actinopterygii, Perciformes, Gobiidae) is a species of goby found in the Black Sea
Man using electronic analyzer for revealing water pollution in mountain river. Environmental protection, biological research concept.
Freshwater Lake
Scientist examing toxic water.
Swimming grass snake (Natrix natrix), sometimes called the ringed snake or water snake,
Small freshwater fish holding in a hand
A teenaged male fisherman enjoying a beautiful day out fishing for trout in Nova Scotia
Man pours sand and gravel into a sluice box in search of gold in a small mountain stream. Gold digger
Scientist and biologist hydro-biologist takes water samples for analysis.
Environmental Scientist Examining Wastewater from factory at industrial estate
Man testing quality of natural water
Closeup view of two salmon together in a redd in Seattle, Washington, United States
A beautiful backcountry Brook Trout caught on an early fall hike.
Close-up as a man carefully returns a brown trout to a river after catching it.
scientist in yellow protective vest, uniform and gloves, collects materials from water, tweezers Petri dish
Fisherman killing the fish after fishing in a lake in the mountains
Selective focus of The zig-zag eel (Mastacembelus armatus), also known as the tire-track eel, tire-track spiny eel or marbled spiny eel.
Active senior hiker refiling his water bottle in a small mountain creek
A large vannamei prawn is held in the palm of the hand with the water blurring in the background.
Expert takes samples of polluted water
Freshwater fish just taken from the water. Single common rudd fish in hand.
Male biologist using multiparameter instrument while testing dissolved oxygen in river.
Environmental Scientist Examining Wastewater from factory at industrial estate
A lot of small fish swimming in the palm and in the water.: Pictures in Thailand
Catch and release pike
Pike Fish Caught in Net Before Being Released - Fly fishing catch and release Pike fish in freshwater lake. Bright backlit sun and details in this closeup portrait of fish. Catch and release fishing.
Biologist that collects data on temperature of a water course for the analysis of its pollution and for the study of its features.
A beautiful brook trout in a fisherman’s hand
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Aquatic biologist releases a threatened goldline darter.jpg
Darter and goldline fishes percina aurolineata endangered aquatic species.jpg
Biologist talk to students on the how to plant aquatic plants.jpg
Manatee aquatic animals.jpg
Oregon silverspot butterfly threatened specie.jpg
Aquatic environment pond landscape.jpg
Threatened golden paintbrush.jpg
Biologist working on field outdoor work.jpg
Aquatic animal mammal underwater manatee.jpg
Girl scouts in frog survey.jpg
Biologist works on board with a laptop.jpg
Aquatic environment swamp water landscape.jpg
Aquatic environment with swamp ground.jpg
Threatened kincaids lupine flower.jpg
Palms in water aquatic environment landscape.jpg
Biologist tracking Louisiana black bear.jpg
Aquatic mammals manatee trichechus manatus latirostris.jpg
Biologist holds a newly hatched sea turtle.jpg
Aquatic environments plants water lilies leaves.jpg
Wetland aquatic environment habitat.jpg
Biologist check childrens plants in the schoolyard wetland area.jpg
Biologist talk with students on how to plant.jpg
Cape Thompson biologist at murre plot.jpg
Invasive aquatic plant four leaf clover lily.jpg
Threatened species white orchid blossoms on stem among associated plants.jpg
Biologist in raft during a fish population survey.jpg
Grasses trees and aquatic plants in a wetlands.jpg
Biologist holding a gray bat at a gray bat survey site.jpg
Delta smelt fish on scale threatened fish specie.jpg
Canada lynx kitten being measured by biologist.jpg
Biologist instruct children on how to use tools for planting.jpg
Biologist show students how to place plants in the wetland areas.jpg
The Santa Ana sucker is a threatened fish species.jpg
Lake covered with aquatic vegetation.jpg
Grasses growing in swamp with other aquatic plants.jpg
Endangered moapa dace fish moapa coriacea in an aquatic environment.jpg
Child with net catching aquatic life.jpg
Aquatic invasive plant water hyacinth eichhornia crassipes in full bloom.jpg
View of wetlands aquatic environments vegetation.jpg
Bald cypress trees and some aquatic plants growing at edge of lake.jpg
Children dig their holes for planting aquatic plants and grasses.jpg
Water lilies on the water surface among other aquatic plants and weeds.jpg
Close view of aquatic plants on water surface in prairie wetland.jpg
South Palm Beach - buildings facing beach.jpg
South Palm Beach - beach empty.jpg
South Palm Beach - sunrise 2004 January.jpg
West Palm Beach station Amtrak train arriving north view.jpg
Beach view north in South Palm Beach Florida 09-03-07.jpg
South Palm Beach - beach north 2004 January.jpg
South Palm Beach - beach north 2004 March.jpg
Finding_fish.jpg
New Instrument Tests the Metal of WTC Steel (5940503481).jpg
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