Why do babies keep appearing?

[Colin_T]

The OP's location is New Zealand - is it the same there?

The breeder keeping them together is one I missed on my list.

No idea if the kiwis (New Zealanders) keep male and female guppies in separate sex tanks at their pet shop. @itiwhetu might know.

 

[itiwhetu]

Even though the fish are imported as male and females. That is usually as far as it goes, very few fish shops both about separating sexes.