Isn't it amazing how well a worm, and slow retrieve, can work sometimes? It works, on different species too. Of course...this is the "dead", of winter. And they don't wish, to become "dead" either. So they will naturally bulldoze, anything and everything too I suspect. Especially if it appears to be, a natural food source!
That's a mighty pretty fish; but hard to see the markings. Is it a brookie? How big, were they?