Lots of old timers in western NY talk about the Blue Pike. Walleyes, not northerns, they talk about getting both on outings Yellows and Blues. Overharvest was the reason for their decline. Never heard of the Blue/ northerns. Yes different species adapt to their environments and mutate over many years. All adaptations to survive. Wonder why we have out tailbones?? Brings ups creation VS evolution debate..
Need to look into more, maybe BIGRED has some info he is usually pretty knowledgable in the fishery area.
By the way different regional names for the same thing kills me. Black bass, grouse, partridge all have region meanings.
Gets confusing to me.