McDonald's introduced the Filet-o'-Fish sandwich in the early 1960s in an effort to entice Catholics to the chain on Fridays. At the time, Catholics were not allowed to eat meat on any Friday of the calendar year.
Not coincidentally, McDonald's Shakes were formulated without using any dairy products so that Orthodox Jews could enjoy them with their meals and still keep kosher. That's why McDonald's never refers to their Shakes as milkshakes.
Which brings me back to the Filet-o'-Fish. I'm not sure I want to know why it's not called a FILLET-o'-Fish. .
Source: Motel Hell

That's horrible! It looks like the sandwich is vomiting on itself. But then again, when has McDonalds cared much for food presentation.
Posted by: Dustin Halstead | 06 August 2007 at 12:42 PM
Orthodox Jews wouldn't eat McDonald's burgers (or anything else) 'cause McD's doesn't use kosher meat.
Posted by: pc | 08 November 2007 at 10:56 PM
You're right. My mistake.
And for the record, my misinformation did not come from Motel Hell; that site was simply the source of the image.
Posted by: PZR | 09 November 2007 at 07:06 AM
That actually looks better than they really do. I'd much rather eat that 40 year old sandwich than the current ones, I think.
Posted by: Brad Clooney | 21 October 2008 at 11:37 AM
I think it was nice of Mcdonald's to create a fish sandwich for catholics to enjoy on Fridays since they couldn't have meat. I hope they create a veggie burger soon for those who do not eat meat or fish.
Posted by: e cig | 10 May 2012 at 04:25 PM