
Bluefin tuna is critically endangered, but it’s still found in high-end markets. It contains extremely high levels of mercury, making it a poor health choice despite its popularity.
10. Eel (Unagi)
Eels, especially freshwater eels, absorb contaminants from their environment. Studies have found high concentrations of PCBs and flame retardants in eel meat.
11. Orange Roughy
Orange roughy can live up to 150 years, which means it has more time to accumulate mercury and other toxins in its body. This deep-sea fish is also at risk of extinction due to overfishing.
12. Grouper
Grouper is prone to ciguatera poisoning—a type of foodborne illness caused by eating reef fish contaminated with toxins. It’s also known to have high mercury levels.
Final Thoughts
Fish can be a healthy part of your diet, but it’s important to choose wisely. Stick to low-mercury options like sardines, wild salmon, or cod. Always check where your seafood comes from, and opt for sustainably caught fish whenever possible. By avoiding the most contaminated species, you can enjoy seafood without putting your health at risk.
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