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Spring is the spawning season for frogs and salamander in the lakes of the alpine mountains of Austria. They grow up  in the fresh, cool and clear water of the lakes.
Axolotl. Mexican walking fish. Ambystoma mexicanum
Raw catfish isolated on white background, top view
Sturgeon - Acipenseridae fish
close up
Aquatic (fresh water) nematode living in pond water among cyanobacteria. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
Goby fish isolated on white background
Swimming slowly, a large white sturgeon and salmon cruise the water in the Bonneville Fish Hatchery and Sturgeon Center along Oregon’s Columbia River.
Planarian parasite (flatworm) under microscope view.
Rat tailed maggot photographed in a studio
Close Up of Shortfin eel ,Anguilla bicolor isolated on white background
Axolotl. Mexican walking fish. Ambystoma mexicanum
Catfish from freshwater fishery isolated on white background  with clipping path included.
Abstract small fish and reflections in the water.
Catfish isolated on white background. Clipping path inside.
Aquarium tropical fish: otocinclus
Polliwogs of frogs and salamader grow up in the clean and fresh water of the alpine lakes of Austria during spring season. May and June are their spawning season.
Mosquito Larva W.M. under light microscope with white background
amazing inhabitants of the microworld under a microscope
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Corydoras pygmaeus, small and cute freshwater tropical fish
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Tapeworms (Cestoda: Caryophyllidea), Parasites of Fish in Thailand.
These garden eels are hovering over the sandy bottom of their aquarium.
Gudgeon fish isolated two sides on white background
Pacific herring swimming in the aquarium
Ambystoma mexicanum - Mexican walking fish - freshwater animal
School of Fish Swimming near Coral
Catfish isolated on a white background
The Arctic grayling (Thymallus arcticus) is a species of freshwater fish in the salmon family Salmonidae. T. arcticus is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missouri River drainage in Montana.  Wyoming.
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