I've researched and now need Your thoughts please

Ok so my balloon Molly started behaving differently so I assumed that she maybe pregnant. This made me realise that I needed to know more about the sex of my fish. So I researched. I now know that my two balloon mollies are female, my two guppies are male and my two endlers are male. My balloon Molly often hides behind a plant and her gravid spot looks darker than it was. But I have also now noticed that the two endlers are persistently following and nipping the guppies.
Any thoughts on either of these things? Could my Molly be pregnant by a guppy? Do I need more endlers so they shoal together to try and prevent them hassling my guppies? Any helpful comments appreciated, thanks.

 

livebearers are not schooling fish (not to my knowledge). not sure about cross-breeding, though. when you bought the mollies, were there males in with them? if there were, they'd be pregnant already, and will be and continue to drop fry for up to six months (in the case of guppies, not sure about mollies).

 

O that's a good point thankyou. I don't know if there were. I'm going there today so I will check. So if the endlers don't shoal (they looked like they were in shop) then why are they sticking to/hassling my guppies, seen as they are male too can't be down to mating.

 

male livebearers will flirt endlessly with anything that moves. maybe your guppies are just a lot more placid than your endlers. if you can, get the endlers out for a few days, let the guppies settle, then reintroduce the endlers.

 

Your mollies are most likely pregnant, as most females from a pet store are shipped with males anyway. Males sometimes show aggression towards each other if there aren't enough males to spread out the aggression.

What size tank is it?

 

About 10 g

 

Mollies are big waste producers and get too large for a 10g. I suggest rehoming her before she gives birth to 30-50 fry.