I was talking to another fisherman on the NF Stilly the other day and mentioned the fish were darkening up or rather getting their color back as the river was clearing and he asked what I meant. I have never seen or heard anyone else talk about this though perhaps it is known by many. I noticed this way back in the seventies on the NF. This is usually a sept/nov thing. Once fall arrives and the fish begin to show more color it is easy to see if you look. When the water has been clear they will be colored up but as soon as you get some rain , enough to put some color in the water, those same fish will get brighter and brighter. Then as the water clears they will revert to being darker. This happens quickly, you can see it change hour by hour as the water clears. Most the time if someone notices they think some new fresh fish have moved in... usually not its just the water color they are reacting to. If there are real "fresh" fish showing they will be truly bright... maybe sea lice , the whole bit. Even if a "new " fish enter that section it will most likely be simply fish from another hole farther downstream not new fish from saltwater. Maybe everyone already knows this but so far in 35 years or so of talking to people about it I have never ran into anyone who seemed to know this. I have also never seen this in print so thought I would put it down here.