I'm having a hard time finding official advice to avoid shellfish that doesn't advise avoiding fish too[1]. In fact, the FDA lists scallops, clams, shrimp, and

I'm having a hard time finding official advice to avoid shellfish that doesn't advise avoiding fish too[1]. In fact, the FDA lists scallops, clams, shrimp, and oysters as having the lowest amount of mercury[2]. It looks like some shellfish toxicity is due to cyanobacteria[3], which is mostly caused by eutrophication from farm runoff. But scaling this system should help with that. [1] https://www.epa.gov/choose-fish-and-shellfish-wisely/fish-and-shellfish-advisories-and-safe-eating-guidelines https://www.epa.gov/choose-fish-and-shellfish-wisely/fish-an... [2] https://www.fda.gov/food/foodborneillnesscontaminants/metals/ucm115644.htm https://www.fda.gov/food/foodborneillnesscontaminants/metals... [3] https://en.wikipedia.org/wiki/Shellfish_poisoning https://en.wikipedia.org/wiki/Shellfish_poisoning