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Originally Posted by blu the betta
some do i heard that paradise fish are in the betta family just like gouramis are so they dont mix. but im not sure if paradise fish are pond fish? does anyone know?
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Depends on where you live or if you are willing to put a heater in the pond. Most places say they can survive down to about 60F. And I know that my pond gets down below 50F in southern Virginia.
As for the longest domesticated fish, I do think the goldfish has that honor. Koi probably come in second, and bettas third. Interestingly enough, both koi and goldfish were originally domesticated for food; it was only after a small population was breeding in a pond did people notice the occasional gold or orange colors.
But there are some other fish that are having captive morphs created. Balloon mollies and balloon rams are the two that come to mind that I really don't like.