On: Farmed salmon leads to loss of nutrients, instead ...

[Unconstrained]

... But if they are higher up the food chain they also accumulate far, far higher levels of heavy metals. This is true for meats and fish.

[bell-cot → Unconstrained]

True, and I vaguely recall a case or few where people showed off their rich tastes (for swordfish steaks, etc.) until their nerves & muscles didn't particularly work together.

But, back during the formative millennia of human nature, that wasn't a problem.