When you catch one, dispatch it quickly if those aren't drowning sets.I set some traps yesterday. A friend has a family of otters cleaning out his fish ponds. Never had the chance to catch an otter. I set Victor #3 coils in the water where they are going over the dam and found a place where they leave and enter in 4 places to poop. lots of big droppings that are mostly fish scales.
Extremely tough and MEAN critters. And they don't care for having people near them while in a trap.