I can verify that steelhead and salmon generations accumulate elevated levels of sulphates, sulphites, and many other substances.

I often fish a stream my great grandfather fished. He used to cure his eggs in some kind of sulpherate canabis sulphited cocaine borax mixture. I tried to get the recipe from him a few times, but he never really made sense. He blabbered something about curing eggs at the crossroads, under the new moon, with Robert Johnson playing in the background.

I'm pretty sure he was a tertiary, primary, secondary, and quarternary consumer. I know he caught one hell of a lot of fish.

To this day, if you consume a steelhead from that stream, you will miss the next three days of work but you sure as hell won't regret it.