At the first Loch Raven Tournament of 2012 I caught a chain pickerel that was very blue in color. All parts of the fish that are generally white (parts of fins, mouth, etc) had a distingtive blue/turquoise hue. What was also noticeable was that the head from the gills forward was blueish in color, more so than the rest of the body.
Has anybody ever seen or heard of this before?
Had it not been a tournament I would have taken a picture but I was too busy trying to catch bass (and catching pickerel instead) to worry about taking a picture of that pickerel.