Whats Got My Guppie Pregnant?

[DavidPenniall]

I have 2 female guppies but the only other fish I have is a platy (unknown sex), neon tetras (unknown sex), baby white mollies (unknown sex but only a cm long so I'm guessing they to young to mate), a female adult mollie, medium size mollies (two inches and sex is unknown), Zebra Danios (unknown sex), Silver Sharks (unknown sex) there was a male guppie but he died about a month ago. Any ideas?

 

[tropic_john]

female guppies can hold sperm for up to 5 months [sometimes more] after mating with a male mollie [unlikely] or guppy just once. So either the guppy that died fertilized them or maybe, just maybe, the mollies if male fertilized them

 

[OldMan47]

The molly is very unlikely but retaining sperm packets from previous matings is a common livebearer survival trick. Most of the poeciliids can hold sperm packets for 6 months or more so a single female can perpetuate the species in an isolated location by producing enough fry to start repopulating the area.