en Genetics Genetics پژوهشي Orginal research papers This study reports on the molecular identification of fish species from processed products which had a priori been classified as belonging to 5 important species in Iran for human consumption. DNA barcoding using direct sequencing of an approximately 650bp of mitochondrial Cytochrome oxidase subunit I (COI) gene revealed incorrect labeling of Narrow-barred Spanish mackerel samples. High occurrence of fraudulent fishery products, if left unchecked, can pose a negative impact on the economy. This investigation adds further concern on the trading of processed fish products in Iran from both health and conservation points of view. Food traceability, Forensic genetics, DNA barcoding, Fish product 783 791 http://jifro.ir/browse.php?a_code=A-10-1272-40&slc_lang=en&sid=1 R Changizi rech76ir@yahoo.com 10031947532846008854 10031947532846008854 Yes H Farahmand 10031947532846008855 10031947532846008855 No M Soltani 10031947532846008856 10031947532846008856 No R Asareh 10031947532846008857 10031947532846008857 No Z Ghiasvand 10031947532846008858 10031947532846008858 No