Labeling is a major issue for all products, but I have to say, I think he'd stop eating everything else he's eating if he was also a scientist in touch with their production.

The food we eat is mass produced, we should assume very low quality and environmental sustainability.

Now, should I stop eating fish? Nothing was proven a health concern, what's the effect of the small plastic I'll ingest through fish?

Most studies I've seen on health correlate healthy individuals with eating fish. Now, those are probably a few years or decade old, is fish worse today? I think it's still inconclusive.