Were you fishing in the hatchery ponds again? Awefully small salmon. Either that or you were using 1000lb test mono
It's Berkeley Fireline Crystal. Apparently it's invisible to fish when looking up. I've put it on the water surface before and looked up at it with goggles on a hot sunny day, and I have to say, it is definitely not as visible as it is from above. The white light coming from above masks it perfectly.
This year on the island, as seen from this video, the fish were incredibly spooky. It was odd, considering many times we had good water conditions compared to previous years. It didn't matter if it was the white braid, the green braid or straight mono - any time the line hit the water the fish scattered. We started "high sticking" as soon as our spoon or spinner hit the water when we noticed fish spooking. This made the lure ride higher in the water, but also kept the line off the water, and we saw much better success in doing so. Most years this has not been an issue. In this particular spot, the river is so wide that keeping your entire line off the water isn't possible, so you tend to get a couple fish in a roe when you first get there, and then they shut off and scatter with every cast.