Foto de stock - 28 September 2023, Saxony, Adorf: A hydrobiologist from the Technical University of Dresden shows young river pearl mussels on the Triebel River in the Vogtland region. 250 mussels from a captive breeding program have been released into the wild. The freshwater mussel is threatened with extinction. For several years, the animals have therefore been bred in a station in the Vogtland district. It is one of four such facilities nationwide. Without this human help, the animals would have become extinct in Saxony, according to experts. Photo: Hendrik Schmidt/dpa. - Adorf/Saxony/Germany

Imagen: 28 September 2023, Saxony, Adorf: A hydrobiologist from the Technical University of Dresden shows young river pearl mussels on the Triebel River in the Vogtland.

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