Do large (old) freshwater game fish have parasites that make them unfit for human consumption?

Do large (old) freshwater game fish have parasites that make them unfit for human consumption?
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Answer :

I wouldn’t worry about it, unless you haul the fish out of some nuclear waste pond. haha I’m pretty sure our ancestors didn’t throw back the big old fish because they were worried about them being toxic. Thorough cooking will kill any parasites and once dead they present no harm. Freezing also renders the parasites harmless from what I have read. People eat animal liver and that is the most toxic organ in the body. The organ that absorbs all toxins.
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