What Not to Eat: Fish & Seafood Edition

I picked up the 2008 Sunrise Guide, which is like those Entertainment coupon books in other cities but specific to "living green in southern Maine." Today's info comes courtesy of them and Oceans Alive:

BEST CHOICES:
Abalone (U.S. farmed)
Anchovies
Arctic char (farmed)
Catfish (U.S. farmed)
Caviar (U.S. farmed)
Clams (farmed)
Crab - Dungeness, snow (Canada), stone
Crawfish (U.S.)
Halibut - Pacific (Alaska)
Herring - Atlantic (U.S., Canada)
Mackerel - Atlantic
Mahimahi (U.S. Atlantic)
Mussels (farmed)
Oysters (farmed)
Sablefish/black cod (Alaska)
Salmon - wild (Alaska), canned pink/sockeye
Sardines
Scallops - bay (farmed)
Shrimp - northern (Canada), Oregon pink, U.S. farmed
Spot prawns
Striped bass (farmed)
Sturgeon (U.S. farmed)
Tilapia (U.S.)

WORST CHOICES:
Caviar (wild)
Chilean seabass/toothfish*
Cod - Atlantic
Grouper*
Halibut - Atlantic
Marlin*
Monkfish/goosefish
Orange roughy*
Rockfish/rock cod (Pacific)*
Salmon - Atlantic (farmed)*
Shark*
Shrimp/prawns (imported)
Skate
Snapper
Sturgeon (wild*)
Swordfish (imported)
Tilefish*
Tuna - bluefin*

*avoid due to high levels of mercury or PCBs