The "fisher cat": ferocious predator of house cats whose bloodcurdling screams pierce the dark of night. Facts about this one wildlife species have mutated a long way into fiction. For starters, fishers are members of the weasel family—not feline. Properly referred to, they're "fishers," not "fisher cats."
As for all the house cats they're thought to kill, here's what a NH Fish and Game species account says: