Are this Aphids?

[LilianaLM]

Thank you all! Yes I did repot actually twice in the last 3 months (actually it did ocur to me that may be they came on the first media I got on a garden center, I did not like that media after some time anyways, as it had lots of peatmoss and seemed very humidity retaining, so I did repot them all on some media I got from repot me , but they have continued... yeah, leaves are fine in all of them... Ill keep an eye, thanks!