You can eat chlorella with your tuna, it binds to mercury pretty well:
Chlorella exceptionally good at binding with dietary mercury
Every brand of chlorella we tested was able to bind with and capture at least 93% of dietary mercury in our gastric acid digestion simulator at the Natural News Forensic Food Lab. Most brands of chlorella captured mercury at 98% - 99% efficiency.
https://www.naturalnews.com/044369_chlorella_heavy_metals_mercury.html
I did know this. Yes. Thank you for sharing. I don’t eat fish for other reasons as well as the mercury
OK, for being a vegetarian or something else?
Well mercury isn’t the only toxin fish are swimming in. Fukushima nuclear disaster is still on going. Radiation is pouring into the Pacific Ocean from this non stop. It’s on going. No end in sight. Basically our oceans are so polluted I don’t eat anything that comes from them. To the best of my ability.