The Planted Tank Forum - View Single Post - Unusual Betta Fins?
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Old 03-13-2013, 04:47 PM   #12
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I didn't say you can't show him (although he's a petstore fish, so ...), but it is a deformity - the way you describe it, and the way it looks to me, it's actually extra fins. I would think that would be genetic and not some sort of weird growth or injury since it's so symmetrical on both sides, so breeding could pass it on.
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