Usually, the larger, apex predators are the fish to watch out for. Sardines, grunion, pearch, cod, sole, bass, sea bass, yellowfin tuna, halibut, small trout, salmon, and char, etc., are fairly safe to eat and have minimal heavy metal and dioxin concentrations. Fish like sharks, albacore tuna, swordfish, large salmon, such as pacific king (chinook), lake trout, basically, fish that eat lots of other fish, have higher concentrations of contaminants. Interestingly enough, the scourge of the great lakes, the lamprey eel, is considered a prize delicacy in Great Brittain. but we can't use them out of the Great Lakes due to high levels of contaminants. The eels are parasitic, and live off of the body juices of large trout and salmon, especially King Salmon (Chinook).
Know the science before jumping in and stating that all deep water fish are dangerous, or all warm water fish are more dangerous, etc. Generalizations are usually dangerous.
Just make sure that when you make a statement, you've done the research, and have references to point to.
Seeeeeya; Chief Longwind of the North
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