I caught some Kakone in Idaho last month. My friends had some of it
smoked. The smoked fish was then inserted into a vacuum bag and
sealed. It looks like it was done with a good home vacuum machine.
The fish does not look as tightly wrapped as you might see with smoked
salmon in a store.

So, does the smoked fish in the vacuum bag need to be refrigerated?
It arrived at my house through Fed Ex packed in dry ice. But we were
not home to receive it.

How can I tell if the fish is okay to eat.

Thanks in advance.