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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.
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.
Byron Hosking, BMus, MA
Vancouver, BC, Canada
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]
Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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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