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Old 06-22-2006, 08:30 PM   #1
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molly fry question

I've had mollies for a while now, but this is the first time I have had some survive! They usually just end up as tasty snacks.

I have five that are now about 5-7cm long. How large will they need to be before you can sex them. I don't want any inbreeding here
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Old 06-22-2006, 10:05 PM   #2
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Not sure how old they have to be, but I know with my guppies I can start to see the gravid spot on the females with in 2-3 weeks
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Old 06-22-2006, 10:22 PM   #3
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I am usually able to sex mollies by their fins in about 3 weeks or so.
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Old 06-23-2006, 07:15 AM   #4
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Thanks, guys.

These all look female, so I wasn't sure as to when you would be able to tell. These five have survived long enough that they won't fit into the bolivan's nor the other female mollies' mouths.
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Old 06-24-2006, 06:06 PM   #5
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Usually when I have molly fry I usually find that it's not the mollies that eat them as much as...every other fish I own does lol. The mollies I have usually only eat a few of them if any cuz I've kept the mothers and babies together before and it's usually my bettas and gourami that eat them not the mollies.
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Old 07-04-2006, 03:06 PM   #6
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It's tough to sex mollies and sometimes they can change their sex. A lot of people disagree with me here, but I have bought an adult femail silver sailfin molly, a month later I had a male molly in my tank chasing after the females with his gonopodium going nuts. I watch my tanks closely and would notice it if it happened before. It was extremly weird but it did happen.

It takes a few months (3-4) before I can usually sex my mollies and I think it depends on how fast they grow and what you feed them. I feed my Baby Brine Shrimp and they grow twice as fast and you can sex them eariler.
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Old 07-04-2006, 03:44 PM   #7
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I have them in with some bolivians and two female mollies. They are too big now for the bolivians to eat.

I would try feeding them baby brine shrimp, but the bolivians would get there first.

Guess I will have to wait to sex them when they are larger. Between the five, they go from nearly all black (except for a little white on the belly) to a honey/golden colour. I'm really interested to see what colours they develop as they grow.
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Old 07-05-2006, 08:23 AM   #8
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The colouring of the fry sound exactly the same as mine. I have a few pure black fry and some a golden brown colour. The mother was a black molly and the father was either an orange sailfin or a silver sailfin. It should be interesting to see how they turn out.
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Old 07-05-2006, 11:19 AM   #9
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Well, they are now about 1-1.5cm long and I can finally tell the sexes. I have two males and three females.

The colourations are the only reason I separated them. I wanted to see how they would turn out, and it seems like I have a whole United Nations of colours

I don't know if I will keep them, but we'll see. Maybe the lfs will want some.
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