Sea fish are a nutritious choice for the whole family, but some species carry higher levels of mercury, a metal that can build up in the body over time. Choosing low-mercury varieties lets you enjoy the benefits of seafood while keeping risks low, especially for children and women.
Why Mercury Is a Concern
Mercury enters the ocean through natural sources and pollution. Large, long-lived predators absorb the most because they eat many smaller fish over the years. High intake can affect the nervous system, which is why young children and unborn babies are most sensitive.
Small and mid-sized fish are generally the safest. Salmon, sardines, anchovies, herring, haddock, cod, pollock, sole, plaice, tilapia and Atlantic mackerel all contain low levels of mercury and can be eaten two to three times a week.
Moderate-Mercury Choices
Some popular fish should be eaten in smaller amounts, around once a week. These include fresh or frozen tuna steaks, sea bass, halibut, snapper and mahi-mahi.
Fish to Limit or Avoid
Shark, swordfish, marlin, king mackerel and tilefish contain the highest mercury levels. Families with young children should avoid them or serve them very rarely.
Smart Tips for Families
Vary the types of fish you serve, since this spreads out any exposure. Keep portions age-appropriate, remove bones carefully for children, and choose baking, grilling or steaming over deep-frying.
Final Thoughts
You do not need to avoid sea fish to stay safe. By favoring small, low-mercury species and rotating your choices, your family can enjoy the full health benefits of seafood. Guidelines vary by country, so check local advice or ask your doctor if you are unsure.
