VERY well put papjoe222 

I think there is a difference between what a bass can see, and what a bass perceives as dangerous. Would bass in a pressured lake with clear water be able to correlate fishing line with being caught? I think it's possible - certainly is the case with trout. Breaking up the silhouette of your line with a marker would likely be helpful. On the opposite side of the spectrum, would a bass in a low pressure lake with stained water care much about line? That hasn't been my observation.

You dont think line visibility is a factor in bass fishing ? 

 

No, not any more. I'm over 50 and have fished with just about every line made for more than 40 years. Today I use braid or fused superline from reel to lure. No leaders. Only use grey or green and here in Florida I have not experienced fish scared of line and run from it. I catch just as many bass now as I ever did without worrying about all the little details that really don't seem to matter to the fish as much as they matter to some fishermen.

 

Just a few weeks ago I was out on a crystal clear spring fed lake and my braid line was actually attracting bass to hit on it and nip at the line itself halfway between the lure and myself. The bass wanted to eat my braid line! That shows me they are not scared of it at all.

How much pressure do those fish receive?  Iv'e had unpressured bass swim between my legs .