Two high school students have determined that 25 per cent of 60 seafood samples from New York sushi restaurants and seafood markets are fakes, often cheap fish posing as fancy – and more expensive.
The New York Times reports that,
"Kate Stoeckle and Louisa Strauss, who graduated this year from the Trinity School in Manhattan, took on a freelance science project in which they checked 60 samples of seafood using a simplified genetic fingerprinting technique to see whether the fish New Yorkers buy is what they think they are getting.
"They found that one-fourth of the fish samples with identifiable DNA were mislabeled. A piece of sushi sold as the luxury treat white tuna turned out to be Mozambique tilapia, a much cheaper fish that is often raised by farming. Roe supposedly from flying fish was actually from smelt. Seven of nine samples that were called red snapper were mislabeled, and they turned out to be anything from Atlantic cod to Acadian redfish, an endangered species. …
"The results of Ms. Strauss and Ms. Stoeckle’s research are being published in Pacific Fishing magazine, a publication for commercial fishermen. The sample size is too small to serve as an indictment of all New York fishmongers and restaurateurs, but the results are unlikely to be a mere statistical fluke. …
"Ms. Stoeckle said the underlying message of the research was simple: “If you’re paying for white tuna and you’re eating tilapia, I think you’d want to know that.”