I was been looking at some mono fishing line and trying to think this through. the line is called Cajun Red and looks red. The theory is that the red line becomes invisible to the fish under water. I know from my experience as a scuba diver that as you go deeper you loose the ability to distinguish color and red is the first thing to go so I understand what they are saying in this respect.
That said we use a lot of red on saltwater flies and some times even use red hooks referred to as blood hooks to give the impression of a wounded bait fish.
So what is it with this Cajun Red?? Are they trying to sell folks a bill of goods or is the red on our flies wasted?
Just food for thought.

Thanks for the input,
Rusty <><

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"PC" is for Plant City not Politically Correct. if you wanna catch something ya gotta get a hook in the water