The 12 Most Contaminated Fish to Avoid at the Grocery Store

Contaminants: Mercury
Why it’s risky: Popular in high-end sushi, it’s another large predator prone to mercury accumulation.
Better alternative: Skip bluefin; choose skipjack or albacore tuna in moderation

11. Grouper
Contaminants: Mercury
Why it’s risky: Large grouper species are high on the food chain and tend to accumulate toxins.
Better alternative: Small whitefish like tilapia or cod

12. Imported Catfish (Certain Sources)
Contaminants: PCBs and other industrial chemicals
Why it’s risky: Imported catfish from poorly regulated farms may carry environmental contaminants.
Better alternative: U.S.-farmed catfish or freshwater trout

Tips for Choosing Safer Fish
Check advisories: Local and national agencies often list fish with high mercury or contaminants.
Eat smaller, younger fish: These tend to have lower toxin levels.
Diversify seafood choices: Rotate between lower-risk species like salmon, sardines, shrimp, and tilapia.
Go wild when possible: Wild-caught, sustainably sourced fish often have lower contaminants than certain farmed or imported options.