guppy prefers Platy over Female guppy

Lizy33

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My male guppy goes after the female platy and totally ignores the female guppy. The female guppy is ugly, poor thing has no nice color, but she's healthy and strong. She has survive a lot. In the pet store she was in the wrong place with a bunch of other fish that were used to feed other bigger fish. Then I thought she was pregnant and never put her in the tank with the rest of my fishes, but after noticing she was depressed and probably not pregnant as I first thought, I put her in the tank with the rest and she's been thriving since then. The male guppy paid attention to her the first day or so. After that he's been all about the Platy. I think they are platy, I'm not sure. I still have to learn to identify them better. Anyway, I thought the two platy were a male and female because of the difference in their fin and tale but I'm not sure if my guppy is trying to mate the male platy too or if they are two females. I'm adding pics and hopefully you'll help me learn more about this. Do you think the male guppy doesn't go after the female guppy because she's not as colorful, or maybe because she is indeed pregnant? Are these behaviours normal? Thank you so much for helping me learn more.
 

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Hi, your other fish are mollies and they appear to be females, guppies and mollies can breed with one another and produce fry, your female guppy is more than likely pregnant too.
 
No, guppies and mollies will not hybridize, so don't worry. Male guppies simply have a high sex drive and will try to mate with anything which might be a female. This is especially pronounced if they grew up or spend a long time without females of their own species. Eventually it will mate with your female and most likely already has without you noticing.

Also, what do you mean by "going after"? Is he trying to mate with them or only chasing them? This could also simply be a hierarchy thing.
 
I had always understood that it was possible for guppies and mollies to interbreed but that they did not do so unless 'forced' to (ie only one of each in a tank) but that the offspring are not likely to survive.
 
@essjay
You are correct. What I meant is, that under normal conditions in an community tank with also male mollies present there would be no hybridization.
 
Hi, your other fish are mollies and they appear to be females, guppies and mollies can breed with one another and produce fry, your female guppy is more than likely pregnant too.
Thanks! Sooo they are Mollies! Lol
Well, some days after arriving home, one of my Mollies had fry. I have 9 of them growing in a separate tank I've been very worry they would continue to reproduce so if they are both females that's better, right? Hopefully if they won't get pregnant by the guppy or reproduce weak fry that won't survive in the tank...I feel so bad saying this, but I don't want an over populated tank :(
 
No, guppies and mollies will not hybridize, so don't worry. Male guppies simply have a high sex drive and will try to mate with anything which might be a female. This is especially pronounced if they grew up or spend a long time without females of their own species. Eventually it will mate with your female and most likely already has without you noticing.

Also, what do you mean by "going after"? Is he trying to mate with them or only chasing them? This could also simply be a hierarchy thing.
Hi. Thank you. He's definitely trying to mate with them. And yes, when I bought him he was in a tank without any females, so that's probably what happened.
 
Just because both mollies are female it doesn't mean there won't be any more fry, I'm afraid. Female livebearers can store sperm and continue to have babies for several months without a male in the tank.
 
Just because both mollies are female it doesn't mean there won't be any more fry, I'm afraid. Female livebearers can store sperm and continue to have babies for several months without a male in the tank.
Wow!
 
I had always understood that it was possible for guppies and mollies to interbreed but that they did not do so unless 'forced' to (ie only one of each in a tank) but that the offspring are not likely to survive.
It is possible, I actually have a fry that survived(attached). I had one molly in my tank with 4 guppies. I have had them in the tank for over a year together and I moved them over to my 120g, but I kept the 15g tank they were in because I have ghost shrimp breeding in it now. After about a week after the fish were moved, I noticed a little fry and originally thought it was a guppy, but as it grew it was actually a molly, and I've always only had one in the tank since I got them. It was hard to take a picture of him as when I get close to the tank he hides.
 

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@Olycius
I don't think it is a hybrid, but let's check again when it is older. Female live bearers can store sperm for very long time.
 

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