Ive caught plenty of nice 10+lb carp on curly tail grubs. I also have caught a 28lb carp on a crayfish imitation. And seeing that i have caught several carp up to and over 20 lbs, a carp would have to be nearly 100lbs to have a mouth big enough to swallow a duckling. Those 20lbers' mouth were not much bigger than the width of 2 fingers

Ive seen a bass pull a duck down when I was wade fishing at the lake. It had it by the tail feathers and there was a lot of sqaucking and splashing. I saw mouth and tail so I know it wasnt the gator doing it cause it was a fish. Ducky got away but I wont ever forget that scene. I fish that lake for the monsters all the time. Hope one day Ill hit a monster like that and get a pic of it.

My cousins in Ohio have a huge pond that we fish in every year... They have carp and bass, and a duckling was eaten by a carp, but I never saw it with a bass... :-/ 1 or 2 years ago, there was a pretty big bass on my line, it must have been about 14-17 pounds, and it's eye was almost as big as when you make a circle with your thumb and pointer finger together.... It got to the dock, then it broke my line.... 8-)

In Ohio?

There is a reason they say Ohio is "high" in the middle.  LOL.