I took advantage of the fact that no people were fishing a usually busy spot yesterday on the Vedder (thank you rain!), so I had the opportunity to observe some interesting salmon behavior in slack water.
I saw coho and pinks holding together (no big deal - we see them all the time), but NOT ONE pink in the holding water wanted to hit a pink fly that usually makes pink salmon go crazy when it is presented in the current. Instead, some of the coho in the "co-ed" went for that particular fly with gusto, although it is a fly that you would never consider keeping in your coho salmon fly box.
Another interesting thing I noticed is that when a fresh school of coho arrived, pinks would yield the 'sweet spot' in the water column to them. My theory is that coho try to show pinks who is boss, and get particularly aggressive when holding together. I almost couldn't believe the aggressiveness of the coho - hence my low hookup to landing ratio. The take of the fly was very violent, and the fish went crazy after I set up the hook on them. I was really glad my reel has a good drag although that is usually not an issue.
For this early in the season, I had an absolutely stellar day hooking into 7 coho, landing 3, with all pinks (except one) staying away from my flies.
Care to share some other interesting tidbits on salmon behavior?