Specifically, DNA of sufficient yield and quality was isolated and purified from all 200 samples. All of these extractions resulted in PCR products clearly visible as single bands of expected size on agarose gel. The positive and negative controls for the extraction and PCR gave expected results. Next, the sequences obtained from the samples and compared against the BOLD and GenBank databases gave successful matches, varying from 98% to 100% pairwise sequence identity. Post-sequencing data analysis revealed that 164/200 (82%) fillet samples were not correctly labeled. In particular, 48/56 (86%) fillets of grouper (E. marginatus) were mislabeled, with 4/48 being identified as belonging to Epinephelusdiacanthus, 40/48 as Lates niloticus and 4/48 as Pangasius hypoph-halmus. All European perch (P. fluviatilis) (100%) samples were mislabeled; specifically, 24/64 were identified as L. niloticus, 36/64 as P. hypophthalmus and 4/64 as Pangasius sanitwongsei. In addition, post-sequencing data analysis found 52/80 (65%) purportedswordfish (X. gladius) to be incorrectly labeled, with 24/52 samples being from Prionace glauca, 20/52 samples from Thunnus obesus and8/52 as Isurus oxyrinchus. All interpretable sequences obtained in this study revealed p-distance values in accordance with taxonomic position.