Mercury Toxicity From Seafood

Mercury is a known neurotoxin and immunotoxin. It crosses the placenta and prenatal exposure at low levels can lead to developmental delays. Based on reports from FDA, EPA and The Environmental Working Group, the following guidelines should be considered:

Low Mercury Seafood

Low mercury seafood

considered safe in pregnancy

  • Trout (farmed)
  • Catfish (farmed)
  • Shrimp
  • Fish sticks
  • Salmon (wild Pacific)
  • Croaker
  • Blue crab (mid-Atlantic)
  • Flounder (summer)
  • Haddock
  • Herring
  • Sardines
  • Tilapia


Moderate mercury

1 serving/month for pregnant women and small children

  • Canned tuna (light is better than solid white)
  • Mahi Mahi
  • Blue mussel
  • Eastern oyster cod
  • Pollock
  • Gulf coast blue crab
  • Channel catfish (wild)
  • Lake whitefish
  • Great lakes salmon


High Mercury Seafood

High mercury

avoid if pregnant or small child

  • Swordfish
  • King mackerel
  • Tile fish
  • Tuna steaks
  • Sea bass
  • Gulf coast oysters
  • Halibut
  • Pike
  • Walleye
  • White croaker
  • Large mouth bass
  • Gulf coast Marlin