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Vairons (Phoxinus phoxinus) is a small species of fish potamodromous very common in freshwater and well oxygenated. It tolerates a pH of 7 to 7.5. Bench Vairons in the Vltava River in Prague minnows wagging bench on the shore at Eglinton Country Park (North Ayrshire, Scotland), Prague, in northern Italy flesh is little esteemed in food, but it is frequently used as lively bait (bait) for fishing for trout, pike and perch. It is also used by the laboratories, including research on the sensory organs.