Stock Photo - 25 April 2023, Brandenburg, Küstrin-Kietz: Sascha Starck, a scientist at the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), misses a specimen of the fish species ""bream"" previously caught in a net on board a research vessel on the German-Polish border river Oder. Steffi Lemke (Greens), Federal Minister for the Environment, informed herself on the same day during a scientific trawl fishery about the current situation after the environmental disaster in 2022. The massive fish kill in the Oder River in the summer of 2022 continues to be the subject of current research. The Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) collects data on the fish stocks in the Oder and their condition three times a year by trawling. Photo: Patrick Pleul/dpa. - Küstrin-Kietz/Brandenburg/Germany