yeah. that's certainly been the approach for reducing exposure to mercury.

but, with plastics, i wonder how significant the exposure reduction is for, say, consuming sardines, given that the plastic particles themselves may be mistaken for plankton.

in other words, what percentage of a low food chain fish's or mollusk's diet is pure plastic?

Lean meats are also preferable to fatty, and animals that grow fast are preferable those that grow slowly.

Pigs and chickens are fairly safe, and perfectly ethical if you source responsibly.