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No, I have had my male betta fish for 3 years, and not once has he gone into hibernation. Good Luck!
My Beta has been inactive and not feeding for at least a week. He lies at the bottom of the bowl, nearly sideways, apparently sleeping. I haven't tried heating the water yet.

Here are two sites answering that question. Both agree that water temperature may be the issue.

http://www.vegsource.com/animal/concerns/messages/23339.html

and

http://en.allexperts.com/q/Freshwater-Aquarium-3216/hibernating-fish.htm

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7y ago

What else can I help you with?