How long is vacuum packed Tuna good for?

I have some Tuna I caught from last summer in freezer - anyone know how long they typically last in freezer?

It's probably fine. But if someone says it's not, are you gonna throw it away?
Just eat it.

At least one year.  Emphasis on at least.  I've eaten 2 yr old fish that was vacuum sealed and blast frozen and even the texture was still good.  Non blast frozen fish might have some texture change, so I wouldn't use it for sashimi, but I'd still eat it seared or however else you like it.