yes, i have heard, neither fish ....herring.

I have heard that in the past, some catholics, looking for excuses, used to eat goose on fasting days.
they held that some species of goose arose from a goose barnacle, so it was neither fish (seafood) nor fowl, and as such was exempt from rules on fasting. how the good red herring got added I haven't a clue.
and neither fair nor foul made me thing of " raining and storming"