Wow - pretty much unanimous. Since I posted the question because I trust all of your opinions I will take the advice and, um, uh........ there MUST be a better word than KILL! I will "prevent it's ability to reproduce". Yeah - that's it!
I even have a hard time killing plants, but to know this is more like an animal than a plant makes it more difficult. I'll pretend it's a weed. And actually, since seeing that photo (love the red nose on the tang!) it actually IS a weed.
Thanks for the feedback. I'll do the dirty deed tonight.
Sue