This Dutch video says about itself (translated):
6 June 2017
Students of the HAS College searched with hand nets in canals and ditches in the National Park de Biesbosch. They are researching the fishery and especially biterling, spined loach and weatherfish.
Reblogged this on Die Erste Eslarner Zeitung – Aus und über Eslarn, sowie die bayerisch-tschechische Region!.
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