Seafood is often praised as one of the healthiest food choices you can add to your diet. Many fish are rich in omega-3 fatty acids, high-quality protein, vitamins, and minerals that support heart and brain health. However, not all fish are created equal. Some species may contain high levels of contaminants, while others are heavily overfished or raised in ways that raise environmental and health concerns.
Nutritionists and environmental researchers often recommend being more selective about the fish you eat. By making smarter seafood choices, you can protect your health and also help support sustainable fishing practices.
Here are 14 types of fish that experts often suggest limiting or avoiding, along with the reasons why.
1. Shark
Shark is one of the fish most frequently mentioned by health experts due to its extremely high mercury levels. Mercury accumulates in large predator fish over time, and shark sits at the top of the food chain.
Consuming fish with high mercury levels regularly may pose risks, especially for pregnant women and young children.
2. King Mackerel
King mackerel is another large predatory fish that tends to accumulate mercury in its tissues. Because of this, many health authorities recommend limiting consumption or avoiding it entirely.
While other types of mackerel can be healthy, king mackerel is often singled out due to its mercury concentration.
3. Tilefish
Tilefish, especially those caught in certain regions, are known for their high mercury content. Health organizations frequently advise vulnerable groups to avoid eating it.
Mercury exposure over time can affect the nervous system, making it important to choose safer alternatives.
4. Swordfish
Swordfish is popular in many restaurants because of its firm texture and rich flavor. However, it is also one of the fish known to contain significant mercury levels.
Because swordfish are large and long-lived predators, contaminants accumulate in their bodies over many years.
5. Imported Farmed Salmon
Salmon is generally considered a healthy fish, but some experts express concerns about certain imported farmed salmon due to potential pollutants and farming practices.
Wild-caught salmon is often recommended as a better alternative.
