Can Anyone Identify These Spots?

hardcorefishhead · Jul 21, 2020

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

T-J · Jul 21, 2020

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

hardcorefishhead · Jul 21, 2020

T-J said:
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.

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