Mislabeled seafood In 2013 the environmental group Oceana (usa. oceana. org) analyzed 1215 samples of seafood purchased across the United States and genetically compared the pieces to standard gene fragments that can identify the species. Laboratory results indicated that 33% of the seafood was mislabeled according to U. S. Food and Drug Administration guidelines. Construct a 95% confidence interval for the proportion of all seafood sold in the United States that is mislabeled or misidentified.