First off, I don't let the otters suffer. I am a hunter and a very good shot, so each shot is well placed and they make quick clean kills. The otters don't breed there, there is a small stream flowing into the pond that the otters follow. Last otter I shot was killed extremely quick, I snuck up on him then blew him a couple of feet into the air with a shot to the head. He died on the spot. Also I don't trap or know anybody that does and attaining traps in my state is next to impossible, so that is out of the question.
I don't fly-fish, but I have tried casting flies to the bass before with no luck. I own a pair of polarized glasses and always circle the pond before I fish to locate the bass, but I stay far enough away so they don't spook. Jerkbaits won't work, right now worms don't either. I agree with ernel, with bass not being hungry this time of year, because I have literally tried every trick in the book with no succes. In a month, I can catch the bass, just they are extremely finicky right now.