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A fishermen weighs salmon fry in a hatchery near the German town of Nuestadt

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A fishermen takes out salmon fry from a tub in a hatchery near the German town of Nuestadt

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Volunteers line up as oxygen bags containing salmon fry sit in the water to acclimatize to the temperature of Kamenice river near the village of Jetrichovice

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Volunteers carrying buckets containing salmon fry walk through woods towards the Kamenice river near the village of Jetrichovice

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Volunteers carrying buckets containing salmon fry walk through the Kamenice river near the village of Jetrichovice

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Volunteers carrying buckets containing salmon fry walk towards the Kamenice river near the village of Jetrichovice

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Volunteers line up as fishermen take out salmon fry from oxygen bags near the village of Jetrichovice

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Salmon fry are seen in an oxygen bag in a hatchery near the German town of Nuestadt

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A fishermen takes out salmon fry from an oxygen bag near the village of Jetrichovice

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Volunteers release salmon fry into the Kamenice river near the village of Jetrichovice

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A volunteer releases salmon fry into the Kamenice river near the village of Jetrichovice

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Volunteers carrying buckets contining salmon fry walk through the Kamenice river near the village of Jetrichovice

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A volunteer releases salmon fry into the Kamenice river near the village of Jetrichovice

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A salmon fry swims in a ladle as it is released into the Kamenice river near the village of Jetrichovice

Members of Czech Fishing Union and Bohemian Switzerland National Park release salmon every year to Kamenice river as part of the reintroduction program kicked-off in 1998. The program is aimed at stabilizing the salmon population in the Czech Republic and at reintroducing the fish to rivers after almost 50 years of absence caused by massive industrial pollution during the communist era. (Reuters)