i had worked in research department in kumho petrochemicals. in my basis of experience. i would predict that a flounder from burrard inlet may have less pollutants than a salmon from alaska. of course, i dont have any specific evidence.
our research team performed a research project which has simililar situation like this topic. suprisingly, sardins which was sampled from petrochemical plants packed kwangyang inlet contained less mercury and dioxin than alaskan pollocks.
the effects of pollution dont result as we expect. a flounder is harmful because it came from burrard inlet? too simple.
usually, a species in a higher niche of ecosystem accummulate nonpolar chemicals and heavy metals in their body from their prey.
i would eat well cooked fishes from burrard inlet. actually, my concern is not pollutans. it is parasitic flatworms!! i belive that more flounders have those worms than other area... i dont know why.. i couldnt find any infos.. i want fresh sashimi. men!!