So here's a weird question that popped into my head the other day...

Bettas as sold in stores look almost nothing like their wild
relatives. Breeders have produced such an enormous variety of colors,
fin and even body shapes, that if you didn't know better, you might
think the domestic and wild fish were totally different species.

So, how is it that two male bettas in separate bowls can always
recognize one another so well, when they barely resemble what
countless generations of instinct have taught them to react to?



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