Can Anyone Identify These Spots?

[hardcorefishhead]

These spots seemed to appear overnight on my rocks..cyano maybe?

 

[T-J]

Pic is a bit fuzzy, but either cyano or coralline algae. Does it blow off the rock?

 

[hardcorefishhead]

Pic is a bit fuzzy, but either cyano or coralline algae. Does it blow off the rock?

It does not blow off, could not brush it off either.