Usually, if I see a bass and I toss a senko at it, I can get it to at least investigate. And if it stays in sight long enough I can usually coerce it into biting. Might take a few minutes and certainly doesnt always work. Longest I have tried to catch a fish I could see was probably 20 minutes. It was two bedding bass and the female was HUGE. I ran cranks through the nest, lizards, senkos, you name it. They only had one thing on their mind. That being said, I normally don't spend much time chasing fish by sight.