 This study reports for the first time the occurrence of Don and Zien in commercial fish feed designed for nutrition of cipronids collected from Central Europe with a maximal Don concentration of 825 and Amp, Hashtag 956, GKG and Amp, Hashtag 8722, 1 feed and an average level of 67.9 and Amp, Hashtag 956, GKG and Amp, Hashtag 8722, 1 feed for Zien indicating a global challenge in controlling mycotoxins in animal feed including fish feed. This article was authored by Sven Danik, Hannah Valenta, Suzanne Kirsten and others.