SQ,

Once the light absorbed by water starts to dissipate, so will the salmon's vision (about 30-40 feet). The deeper the salmon goes the less vision he has. He then has to rely on his sense of hearing - which isn't really hearing but sensing (or feeling) - through the lateral lines along his body - capula. He knows, through instinct, his surroundings at all times. The tiny vibrations of herring swimming are picked up by the latteral line- he can home in right to them.

IMO (or guess), I doubt a salmon can see more than a foot (maybe two) in depths greater than 100'. They rely to heavily on sound to home in on prey or something of curosity. This is why it is so important to make a lot of noise.. (flashers, weight, even gang trolls (shhhh). The closer they get to the target, you'll want them to see it. This is why I use all glow colors. Then smell.... (This will definately remain a secret unless we fish together- then it ain't a secret anymore)

By all means, I am not saying just stick to glow lures. Color combos like the Cop Car (or purples, blues and greens) produce because of their silhoutte. If I was a betting man (and I am), glow colors will out fish lure that don't glow 10 to 1.

Downriggin'