39% of U.S. seafood is mislabeled, with species substitution enabling $10/kg price fraud and undermining fisheries management data

A 2024 meta-analysis of 35 studies covering 4,179 samples from 32 U.S. states found a seafood mislabeling rate of 39.1%, with outright species substitution in 26.2% of samples. Globally, the FAO and IAEA estimate that up to 20% of aquatic products are intentionally mislabeled, with restaurant mislabeling rates reaching 30%. NOAA's own inspectors find some kind of fraud in up to 40% of products voluntarily submitted for inspection. Why it matters: Mislabeling enables the substitution of cheap farmed fish for expensive wild-caught species -- such as farmed Atlantic salmon sold as wild Pacific salmon at a $10/kg markup -- so consumers systematically overpay while price signals that should incentivize sustainable fishing are destroyed, so fisheries management agencies cannot accurately track which species are actually being harvested and consumed because trade data is corrupted by fraud, so overfished species continue to be harvested and sold under the names of healthier stocks without triggering regulatory intervention, so conservation efforts fail because the true market demand for vulnerable species is hidden inside a fog of fraudulent labeling. The structural root cause is that the U.S. Seafood Import Monitoring Program (SIMP) only covers 13 species groups despite hundreds being traded, DNA testing is not required at point of sale, and the fragmented supply chain -- spanning fishing vessels in Southeast Asia, processing plants in China, distributors, and retail -- creates dozens of opportunities for substitution with no chain-of-custody verification between nodes.