I wonder if the fact that that pig at the delta was eating cats had anything to do with it's color. The only time I've caught bass that color was at Oso resevoir last year- the lake was closed and our club was invited to go out and fish to get as many bass as we could for Rick Mendoza at Laguna Niguel lake, so we were just catching a ton of the Oso runts and putting them in a pen for Rick. Some of the fish were that yellow color, and we were tripping on it, until we started finding baby cats in a lot of their throats- they were eating small cats or bullhead (they were pretty yellow and looked like bullhead) and the bass were heavily yellow colored. That's the first thing I thought of when I saw the photo of that Delta fish, so maybe it's the cats?