A bit of a Puzzler

IvyGreen

Hi Everyone,

We´ve kept a modest 50 l aquarium for years and really enjoy our finned friends. Naturally, we´ve come across all sorts of challenges from illnessess to aquarium cracks to snail population bursts. However, a new puzzler has presented itself.

Last year, we had two fish, a Swordtail and what I am pretty sure is a Platy; it´s name is Beastie (affectionately). The Swordtail went to the big aquarium in the sky around 6 months ago leaving only Beastie, who took to the solitude just fine, it seemed. And, ummm, yesterday we saw a fry in the tank that has only had one fish in it for months. I don´t think we´ve got an Amazon Molly on our hands, so any suggestions as to how this has occurred would be greatly appreciated. Beastie isn´t aggressive toward or curious about the fry and just swims around it. I understand that the fry may be eaten. The first picture shows the fry in the mid-upper area behind Beastie & the fry is a little bit further toward the upper-right in the second. (sorry about the reflections!)

Swish, Swish, Thanks!

Ivy
 

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Jo7984

Hard to tell from the pic of Beastie but it might be a girl.

I think they can hold sperm for possibly months, until conditions are right to have babies then they can spawn.

I'm sure someone will correct me if I'm wrong :)
 

IvyGreen

Swish, Swish, Thanks Jo!

I did not know that females can store sperm for such a long time. However, will a Swordtail & a (suspected) Platy engage in such "activity"?

Ivy
 

Ouse

Swish, Swish, Thanks Jo!

I did not know that females can store sperm for such a long time. However, will a Swordtail & a (suspected) Platy engage in such "activity"?

Ivy
Yup, they can store sperm for a long time! It seems platies always find a way to have fry in our tanks. ;)

I’ve had different species of livebearers breed in my tanks before. I’m certain a swordtail and platy will crossbreed.
 

carsonsgjs

Swish, Swish, Thanks Jo!

I did not know that females can store sperm for such a long time. However, will a Swordtail & a (suspected) Platy engage in such "activity"?

Ivy
Welcome to the forum ivy.

in answer to your question, i believe platy and swordtails can breed together and produce hybrids. They are quite closely related to each other. There may well have been more fry but they may have been eaten already.
 

IvyGreen

Thanks StinkyLoaf!

This is all starting to make sense now.

Ivy
Thanks Carsonsgjs!

Yeah, I was wondering why I only saw one & suspected that Beastie just saw food & munched away. And well, I haven´t seen the single fry again since this morning. It´s so tiny, it could be hiding anywhere, including in Beastie´s belly. That´s a seriously short & tight circle of life.

Oh! And based on the pictures I just looked up, I guess Beastie could simply be a female Swordtail.
 

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