I wonder if there's a connection between this and the Wendigo I knew as a child which was a naturally occurring cross between a Speckled (Brook) Trout and a Lake Trout, and now generally referred to as a Splake. These did exist before mankind got into the business of rearing trout strains, and my understanding was that the people of the First Nations in the area near Georgian Bay (and maybe elsewhere) called them Wendigo. Nowadays of course, there are too few naturally occurring Lakers and Brookies to create Wendigo, and this is a tragedy.

Mooh.