Stock Photo - 15 October 2019, Saxony-Anhalt, Hasselfelde: Professional fishermen fish the small whitefish. The small whitefish was released in the 60s as a food fish for the large predatory fish. On behalf of the Sachsen-Anhalt dam operation, it will be fished off in the coming weeks. The whitefish has increased massively in recent years and threatens to affect the quality of drinking water. In order to maintain the water quality, up to three tons of this fish are now to be taken out of the reservoir. Photo: Matthias Bein/dpa-Zentralbild/ZB. - Hasselfelde/Saxony-Anhalt/Germany

Stock Photo: 15 October 2019, Saxony-Anhalt, Hasselfelde: Professional fishermen fish the small whitefish. The small whitefish was released in the 60s as a food fish for the.

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