Quote Originally Posted by john h View Post
here is my thinking on it... from time to time there is fish that come out blue for example if you google any blue walleye reports you will find that its not the old blue walleyes that are extinct but just some sort of either genetic mess up or some sort of color varient...i researched and found out that this happens also in yelow perch and crapppie but it is very rare.. her is an article i found on blue waleye that has a paragraph expalining how it happens kind of..Fish have bodies in their skins called chromatophores which carry pigments of different colors. These chromatophores expand and contract, much like the pupil in an eye, as the fish encounters backgrounds of different colors. This allows many species to change color in just 20-30 minutes.



Blue walleye - Wikipedia, the free encyclopedia
that was my first idea too. when i vaught it i thought about the blue walleyes.