Environmental genotoxicity and cytotoxicity levels in fish from the North Sea offshore region and Atlantic coastal waters

► Geno-cytotoxicity effects assessed in fish from the North Sea and near the Iceland. ► Reference levels of nuclear abnormalities detected in fish from the Iceland area. ► Increased environmental geno-cytotoxicity detected in the North Sea study stations. ► Geno-cytotoxicity biomarkers in haddock Melanogrammus aeglefinus assessed for the first time.