Join Date: Aug 2011
Location: Kingston, Ontario
It would be hard. The faster fish would probably wear him down. My fancies can be rather rude to each other (they go nuts chasing each other when they start to spawn). And you'd probably have to hand feed him just to make sure he does okay. Fancies are also less cold tolerant, depends on where you are, but he'd have a much smaller time frame of living outdoors than the comets do.
Yes goldfish are terribly invasive, they have taken over natural ecosystems by the thousands in North America.
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