micro algue id

Hi all, It has come on a drag originally as just 2 leaf branch. I have kept it in the back of my AIO where it gets some light and it is doing really well sometimes I think too well but I have no idea of what type it is and if I should really avoid it. can you advise please?

Hi all, Can you ID this algae for me. It kind of has some roots too. Came on a side of a coral and actually likes it in my tank but unsure if it will be any harm to let it grow Thanks