Can fish see our line?? Possibly so.. Imo I don't worry too much about it. There are tons of factors that go into catching fish. Bass fishing can be, in some aspects, very complicated especially bass fishing. To me it's challenging and that makes it fun. I try not to over complicate it too much. If fish are smart enough to recognize what our line is they may be too smart for me and I may need to look for another hobby lol.!!