The Seafood Nutrition Guide (Fish & Shellfish)
Shark, wild
FDA/EPA Choice to avoid (listed as “Shark”) in the FDA/EPA Advice about Eating Fish (revised October 2021). How much and how often is their advice, not ours.
Composition per 100 g as eaten — cooked, or canned and drained. Mercury is FDA’s species mean, as FDA publishes it; for species FDA does not cover, the sample-weighted mean of the surveys listed. Dioxins + PCBs are survey means (or a median, where noted) per gram of fish as sold, in each survey’s own TEQ scheme. USDA SR Legacy has shark only raw or batter-fried, so there is no as-eaten composition row and those cells stay empty. Tagged wild: sharks are caught, not farmed.
Mercury(ppm)
High mercury — an FDA/EPA Choice to avoid.
FDA — Mercury Levels in Commercial Fish and Shellfish (1990–2012): Shark, mean of 356 samples (FDA 1991–2007) (2007)
Dioxins + PCBs(pg TEQ/g)
Mortimer DN et al. (UK Food Standards Agency) — Dioxins and PCBs in farmed and wild fish: how important is the difference? Organohalogen Compounds (Dioxin 2006) (2006)
An empty cell means we do not yet have a method-cited source. Rank 1 wins the published rule; it is not medical advice.