I got this list off of the Natural Resources Defense Council's website...I did have another one but can't find it..it actually was great b/c you could print of a small folding copy of the "best and worst" fish for quick and easy reference that could be kept in your wallet or wherever...if I come across it I will let you know but here is a pretty comprehensive list:
LEAST MERCURY
Enjoy these fish:
Anchovies
Butterfish
Catfish
Clam
Crab (Domestic)
Crawfish/Crayfish
Croaker (Atlantic)
Flounder
*
Haddock (Atlantic)
*
Hake
Herring
Mackerel (N. Atlantic, Chub)
Mullet
Oyster
Perch (Ocean)
Plaice
Pollock
Salmon (Canned)
**
Salmon (Fresh)
**
Sardine
Scallop
*
Shad (American)
Shrimp
*
Sole (Pacific)
Squid (Calamari)
Tilapia
Trout (Freshwater)
Whitefish
Whiting
MODERATE MERCURY
Eat six servings or less per month:
Bass (Striped, Black)
Carp
Cod (Alaskan)
*
Croaker (White Pacific)
Halibut (Atlantic)
*
Halibut (Pacific)
Jacksmelt
(Silverside)
Lobster
Mahi Mahi
Monkfish
*
Perch (Freshwater)
Sablefish
Skate
*
Snapper
*
Tuna (Canned
chunk light)
Tuna (Skipjack)
*
Weakfish (Sea Trout)
HIGH MERCURY
Eat three servings or less per month:
Bluefish
Grouper
*
Mackerel (Spanish, Gulf)
Sea Bass (Chilean)
*
Tuna (Canned Albacore)
Tuna (Yellowfin)
*
HIGHEST MERCURY
Avoid eating:
Mackerel (King)
Marlin
*
Orange Roughy
*
Shark
*
Swordfish
*
Tilefish
*
Tuna
(Bigeye, Ahi)
*
* Fish in Trouble! These fish are perilously low in numbers or are caught using environmentally destructive methods. To learn more, see the
Monterey Bay Aquarium and the
Blue Ocean Institute, both of which provide guides to fish to enjoy or avoid on the basis of environmental factors.
** Farmed Salmon may contain PCB's, chemicals with serious long-term health effects.
Sources for NRDC's guide: The data for this guide to mercury in fish comes from two federal agencies: the Food and Drug Administration, which tests fish for mercury, and the Environmental Protection Agency, which determines mercury levels that it considers safe for women of childbearing age.
HTH...