Doug Quarnstrom wrote:

Does anybody here know if foxes and coyotes will fish for koi?

I would have thought foxes, probably, but not coyotes. However:
http://tinyurl.com/9gvhf and http://tinyurl.com/9468t say coyotes will eat
fish. Google shows plenty of references to fish in fox diets.

Foxes are probably more likely to be around home ponds, but if you're rural
or close to any decent sized green space, coyotes can't be ruled out.
--
derek