It was a Carp,
Topwater Carp fishing gets the blood running, as does all topwater fishing, except Carp will maybe nudge your offering a time or four before very slowly taking it under, doing this on 6lb P-Line, out of this world.
That is a strange way to fish them, although they can be curious to sample things on the surface especially when they are used to eating things off the surface, either naturally or from people feeding them.
Carp, if I am not mistaken, are the most popular gamefish in the world, obviously not so much in the U.S.
Look up Match Pole Fishing.