This fish has the fins of a Black Moor and the body shape somewhat but also
sows many traits of the Goldfish. Our pond is in Ontario Canada and our
winters get pretty severe. We build a small greenhous out of 2x2s and
plastic sheeting. Even at 20 below zero outside we have managed to keep it
ice free. We do use a small pond heater too, just incase. You can see more
pictures of the greenhouse at this site.
http://community.webshots.com/album/40599526XcKTmj