Produced by crossing the speckled trout (S. fontinalis) with the lake trout (Salvelinus namaycush).
The brook trout's sperm has also been combined with the eggs of a lake trout which results in a splake, a fish that has been introduced into some of the North American Great Lakes....
The resulting hybrid, known as a splake, supports intermediate features.
Because the splake is a hatchery-produced hybrid, is does not occur naturally anywhere in the world.