Tropical Fish Keeping - Aquarium fish care and resources

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-   -   At what age (size) can a baby Guppy breed? (

Inga 11-01-2010 01:56 PM

At what age (size) can a baby Guppy breed?
I am wondering how soon I have to separate the babies? I don't want any more breeding going on at all. I certainly do not want babies breeding mama's or sister brother stuff going on. I just cant really see for sure if they are girls or boys yet. I see fins on a few so I know they are girls but not sure about some of the smaller one. I want to dip the boys out before there are any more issues. Honestly, I have not been able to identify any boys yet. Do they all look like girls until they are older? Also, is the color they are now at only a few weeks old, the color they will remain? Looks like I have a whole loot of dark colored fish. I only have the one baby that is yellow all the others are blue/purple.

Byron 11-01-2010 03:22 PM

I believe they can breed before the colours develop, i.e., before males look like males. And once impregnated, a female can deliver several batches without further insemination. The pointed anal fin (the gonopodium) of the male is the external difference. I haven't had livebearers since the early 1980's, so I am recalling this from memory. I dare say one of the livebearer aquarists here will have a good idea on the age at which this is likely to occur.


Inga 11-02-2010 03:43 PM

Well that isn't the news I was hoping for. lol Is it possible to have all girls in a group or do they look like girls first only to end up being boys? I see fins on all of them. At least that I could tell. I have been trapping them in a catch net and looking them over. I see fins on all of them and no gonopodium. I thought I had read somewhere they can look like boys first and end up being girls but not the other way around. Yikes! I might have to look into a carnivore to take down the numbers. My Gourami didn't do the job.

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