Pond Boss Forums GENERAL QUESTIONS Wildlife Management Is he good or bad?

While cleaning up around the pond's edge(taking advantage of the dry weather), I came across this crayfish. I never seen one in there before, so I was really suprised. I was going to look into possibly stocking them someday. BUT...is this a good kind or not? Just curios on it's name and other comments of what good/bad will come of them being in there.

Thanks in advance, Jim