Photo de stock - The biologist Alex Jordan of the Max-Planck-Institute observes a Neolamprologus multifasciatus with a barcode attached to his head at the University in Konstanz, Germany, 12 December 2017. Scientists research the collective behaviour of fishes at the University of Konstanz. Photo: Felix Kästle/dpa. - Konstanz/Baden-Württemberg/Germany

Photo de stock: The biologist Alex Jordan of the Max-Planck-Institute observes a Neolamprologus multifasciatus with a barcode attached to his head at the University in Konstanz.

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