The Planted Tank Forum - View Single Post - Male Plakat Sold As Female? Or Just An Aggressive Female?
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Old 01-31-2013, 06:13 PM   #49
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The only way I know how to tell a male betta from a female betta is the presence of an ovipositor on a female betta. It just looks like a white dot behind the ventral fins. Take a look at some pictures online to get a good sense of what to look for.

Found this useful article:
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