Tropical Fish Keeping - Aquarium fish care and resources

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Little-Fizz 08-08-2008 08:00 PM

Sexing swordtails
Alrighty, I know how to sex swordtails... But does anyone know how old they have to be before you can tell if it is a male? Or maybe how big they are? Because I can't really remember just how old my swordtail is... It was cold thats all I really remember. But its probably about an inch big... Big enough that I was sure I would know if it was male or female. But lately it looks like its developing a sword on his tail? Theres nothing sticking out from the tail. theres just slightly different colourations on his tail now.

Pasfur 08-08-2008 08:01 PM

You can tell at a pretty younge age. When they are 1'' in length, it is easy.

Chrisseh 08-26-2008 10:35 AM

Occording to one of my books; sometimes the maturation process is delayed in swordtails. How big are they now? The book does not suggest at what age the gonopodia and tails grow at, unfortunatly. I would give it a little more time. I hope I am helpful.

Little-Fizz 08-27-2008 05:56 AM

He is pretty big now. And I'm 100% sure he is in fact a male. His sword on his tail is getting pretty big. Thank you!!!

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