HOLY?? Mackerel

Way, way, back in the "Hists of Mistory" we were taught about the Secret Christians using a fish "Doodled" in the dust/sand to introduce themselves.
A bit like a well known "funny Handshake".

It didn't take me all that long to christen it the "Holy Mackerel".
You see an awful lot on car bumpers, Back windows etc.

BUT .....

This is the first PAGAN Holy mackerel I've ever set eyes on.