|Of course there has to be fish! I was told by many people that Goldfish and especially Koi would not survive in the pond over winter.
The winter of "95-96" we had a record 133 hours of below zero air temperatures. The ice in the shallow end froze down 10 inches while the ground froze down to 4 feet. I was anxious to see the first fish in the spring and happily all but 5 survived!