Uncovering Fictitious and Fraudulent Fish with the Barcodes of Life

Could the DNA barcodes used to expose widespread fish fraud also become a shopper's best friend?

Argentine Roughy, Cherry Snapper, and Salmon Trout only exist at the fish market. They’re fictitious names for fish that don’t exist anywhere, except in the minds of unscrupulous fishmongers. "Grouper" sometimes gets sold as catfish. Gulf shrimp spawn, impossibly, in Thailand. Menhedan masquerade as "Pamplona Sardines in tomato Sauce." Importers traffic in "Leather Jacket Fillets" or "Freedom Cobbler."

Despite growing awareness about the origins of our food, we’re often served a completely different fish species than the ones we order. This comes with economic costs and often means that sustainable seafood you’re eating might not be so sustainable. Global "ichthyologic name-swapping" obfuscates the origins of fish, so contaminated or toxic food causing health problems often can't be traced to the source.

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