...
For more information on fish consumption advisories across the country, visit EPA's fish consumption web pages.
In addition to the subtle impairments noted above, symptoms of methyl mercury poisoning may include; impairment of the peripheral vision; disturbances in sensations ("pins and needles" feelings, usually in the hands, feet, and around the mouth); lack of coordination of movements; impairment of speech, hearing, walking; and muscle weakness. People concerned about their exposure to methyl mercury should consult their physician.
Other Risks
The fish may have bacteria, virus, parasites and other disease causing organisms. In most cases there are no regulations to verify the fish catch for such stuff. Sometimes the fish go directly from the fishermen to the consumers without any sort of regulating body. sometimes the fishermen themselves are the consumers which complicates the situations further. It is specially a greater problem if the fish is caught in recreational fishing like sports angling.
...