In my experience, catfish aren’t line shy. Nothing has led me to believe that the color or size of my line has made an ounce of difference. And that includes fishing the shallows with clear water and not so much as a ripple on the water’s surface. However, I feel that trophy catfish in frequented angling locations must be a little more wily and cautious than your average cat. It’s just a gut feeling, and I have little but anecdotal evidence to support this, but these targeted monsters didn’t grow to 100 pounds without being a bit clever.