Stock Photo - 16 June 2020, Brandenburg, Harnekop: A stunned small eel is on the hand of Janek Simon, scientist at the Potsdam Institute for Inland Fisheries. Because the eel is no longer able to maintain its species in Europe on its own, man must help. Every year millions of glass eels are released into Brandenburg waters. But what actually happens to the miniature fish? Scientists now want to know more precisely. Photo: Patrick Pleul/dpa-Zentralbild/ZB. - Harnekop/Brandenburg/Germany

Stock Photo: 16 June 2020, Brandenburg, Harnekop: A stunned small eel is on the hand of Janek Simon, scientist at the Potsdam Institute for Inland Fisheries.

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