Help with ID please red something in 5 month tank

[JK75gal]

Hi Folks,

still new and found this "new" addition in small spots around the tank, actuall only on the rocks at present and only a few, started a day or so ago is when I noticed. Can someone please help identify?
This is the best pic, i have no luck with an kind of clear images in the tank.

thank you!!!

 

[KrisReef]

cyanobateria, appears to be.

 

[JK75gal]

cyanobateria, appears to be.

Thank you for the quick reply! I will start my Google adventure.. much appreciated!!

 

[PocketGoose]

I would agree, looks like cyano.