I don't believe it is the same species as officials have listed the blue walleye of the Great Lakes as being extinct in the early 1980's. Although, there is still some research that tells two different stories. The blues that I have taken in the past few years(Canadian lakes) resemble what the are saying in this article http://wayneschaefer.blogspot.com/
The blue slime will stain anything it comes in contact with. It easily washes off.