This process is called bioaccumulation, and it means that the larger and older the fish, the more toxic it becomes. (Healthline)
By the time that fish reaches your plate, it may contain mercury levels high enough to harm your body.
WARNING: Fish You Should Stop Eating (Or Strictly Limit)
Some fish consistently rank as the highest in mercury and toxins. Health authorities and scientific studies repeatedly warn about these species:
🚫 High-Risk Fish to Avoid
Shark
Swordfish
King mackerel
Marlin
Bigeye tuna
These fish sit at the top of the food chain and can contain dangerously high mercury concentrations. (Healthline)