I have dozens and dozens of large snappers in my 6.5 acre pond, most won't fit in a 5 gallon bucket. The only fish they would, or could catch are either dead already or dying. They do a great job of cleaning up the pond of decomposing critters.
I watched a Muskrat die (I think it was probably lead poisoning) and in less than a minute there were ripples from movement. A closer look thru a scope I just happened to be holding revealed a large snapper ripping off chunks of flesh.
I will say that cleaning one was by far the hardest of any animal that I've ever cleaned, but it made a great tasting turtle soup. There have been several past threads on snappers including one with a link to a much easier way to clean one than the way I did it. A search should bring up lots of information.
Good luck.
Dan