Seafood fraud increases health risks in U.S. sushi

Experts are warning that many sushi dishes in the U.S. contain fake fish. Cheaper fish are often sold under the names of popular types, like salmon or tuna. This mislabeling can be hard for customers to notice. Some fish, such as snapper and tuna, are frequently mislabeled. A study from 2018 found that up to 100% of Atlantic Bluefin tuna sold in some countries might not be what it claims to be. Another study noted that tiger prawns in the U.S. are commonly misidentified. The reasons for this include the use of more generic names to avoid confusing buyers. For example, "tuna" could refer to many different species. Experts stress that the most popular fish tend to have higher rates of substitution. In some cases, the substitutes can be harmful. Escolar is one such fish used instead of tuna; it can cause stomach problems because it contains an indigestible wax. This issue has led to food poisoning in the past. Seafood fraud is becoming more common due to a complex supply chain. Many steps in the process—from boats to stores—can make it difficult to track the fish's origins. To help avoid getting ripped off, experts recommend buying fish from supermarkets that provide clear labeling. Look for products that show the species, where it was caught, and how it was caught. Avoid poorly marked products, as they are likely to be mislabeled.