Species authentication of octopus, cuttlefish, bobtail and bottle squids (families Octopodidae, Sepiidae and Sepiolidae) by FINS methodology in seafoods

In the present work a molecular a method for the authentication of cephalopods products was developed, which allows the genetic identification of about 30 species belonging to the families Octopodidae, Sepiidae and Sepiolidae. This molecular system is based on the phylogenetic analysis of DNA sequences. The molecular marker studied was the cytochrome b gene (cyt b), that was amplified by PCR and subsequently sequenced. The developed methodology was validated and further applied to 20 commercial samples, detecting 6 that were incorrectly labelled (30%). Therefore, this molecular tool could be applied in questions related to correct labelling, traceability, and import control of products containing the taxonomic groups studied.