Cod liver oil- isn't a liver full of toxins?

Hi...

Many people recommend cod liver oil for its omega 3 oils and its abundance of vitamins A and D.

My question is...how can it be healthy to eat the oil extracted from an animals toxin filtering organ?
I can't imagine the abundance of toxins that would inherently be in such an oil.

I think if someone ate the oil from my liver, they probably wouldn't live through the night.

Thanks for your input