I found out some more info: be careful w/ some raw wild fish, as several species (trout, walleye, pike, to name a few) are kown to carry parasites that only thorough cooking will kill.

cooked & cleaned shrimp is good.

If ever in doubt cook the meat first or do not feed at all, and a lot of stores (in us anyways) carry raw seafood for sushi preperation, it seems a lot of ferret people feel safe about feeding any of that seafood, after all if humans can eat that raw it makes us feel safer that our fuzzies eat it.