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Old 10-15-2019, 05:12 PM   #1
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35+ swords all males!

Hello folks. Iím new to the forum and looking for insight. I have a 3.5í x 12Ē x 18Ē tank with all swords (and a Ďsuckerí lol). They are all babies that have grown in the tank (none are pet store originals). In the paste Iíve always had two or three female who regularly have fry. However, recently, all of the babies are turning male and even some that were clearly female have now started changing. They have a lower tube fin and a sword tale. I now have maybe 1 or 2 breading females and 35 or so males. What is going on? Amazingly there are only a few fights and very few deaths. Is there something making them all become male?
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Old 10-15-2019, 07:43 PM   #2
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Temperature can have an effect on sex ratio .
High temps yield more males .
Do you keep your tank over 76f??
Welcome .
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Old 10-16-2019, 05:33 PM   #3
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Quote:
Originally Posted by coralbandit View Post
Temperature can have an effect on sex ratio .
High temps yield more males .
Do you keep your tank over 76f??
Welcome .
Agree!

I've got a bunch of alvarezi swordtails. Most fry that have grown to adulthood from this year are mostly males. And it's also still peaceful in the tank.
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Old 10-21-2019, 06:25 AM   #4
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Thanks!

Thanks everyone. I will double check the temp and adjust. I wonít worry too much as long as they are still peaceful.
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