Fish with the Highest Levels of Mercury
- King Mackerel
- Swordfish
- Tilefish
- Shark
Fish and Seafood with Mid-Range Mercury Levels
- Tuna (all varieties except skipjack)
- Orange Roughy
- Marlin
- Grouper
- Spanish Mackerel
- Chilean Seabass
- Bluefish
- Lobster
- Weakfish (sea trout)
- Halibut
- Sablefish
- Striped Bass or Rockfish
Fish and Seafood with Low Mercury Levels
- Snapper
- Monkfish
- Carp
- Freshwater perch
- skate
- Canned light tuna (skipjack)
- Spiny lobster
- Jacksmelt
- Boston or Chub Mackerel
- Croaker
- Trout
- Squid
- Whitefish
- American shad
- Crab
- Scallop
Fish and Seafood with Very Low Mercury Levels
Catfish
Mullet
Flounder, fluke, plaice, sand dabs
Herring
Anchovies
Pollock
Crayfish
Haddock
Sardine
Hake
Salmon
Oyster
Tilapia