Have no way to electroshock nor do I wish to pay someone to electroshock. I could drain the pond but with a refill not likely this year, I would like to avoid that until fall so we are not looking at a hole all summer.

My assumption would be LMB but honestly I have absolutely no idea.

I have no idea when they were stocked, how many, or if they were even stocked as the property is not at my residence.

Only trying to explain why we have no FHM, alive or dead, and the potential sighting by the neighbor. Other reasonable explanations accepted, I have no others.