Do Frozen Food Have An Expiry Date?

[VidVid]

i was just wondering if frozen fish food such as blood worms and brine shrimp have an expiry date??? Do they eventually loose nutrition over time if kept in the freezer for too long?

 

[luque]

should be able to last for ages if frozen i would think

 

[WILDER]

I think they have a shelf life of 3 months in the freezer, but not sure.