Quote:
Originally posted by 33girl
OK, I KNOW I'm going to be sorry I asked this, but how on earth do you tell a fish is male or female until it reproduces? I'm really really hoping that's how they found out this one was a she.
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In some species of fish you can determine gender by the way they grow... I can't remember.. I think it was guppies? The males are usually the skinnier ones with beautiful tails.
I'm not sure about koi though
