Is this coralline???

So, today was a great day of tank maintainance, i even cleaned up the fuge! Now that i can see thru the glass, i found some blue/ gray "coralline". Has and one seen this before or is it something else?

Thanks for lookin!

 

Yeah, it looks like its bleached though..But its def coraline, i think there is some to the right of it that is alive though.

 

Mine looks like that after the snails try to eat it LOL.
Or the time I cleaned my powerheads off in RO/DI water.

 

You can usually tell coralline because it looks like paint splases. I have the typical purple coraline, then I have a dark maroon coraline and I have bright orange coraline and faint faint green spots...the moral...Its comes in many colors. is distinct i texture diffrence from most other algae.