Ted,
The otter will try to eat every fish in your pond and will eventually succeed even if he has to multiply to do it.
If you're in eastern NC there is already an otter season. There will be one in Western next year.
My son traps them if you're close by (Surry Co.) if not get in touch with your local game warden. He is the best source for a reliable trapper.
Trapping season is in for about another week but you can get a depredation permit.
