ID please?

[GillMeister]

What is this? I've never seen anything like it. It's a very dark brown color. It can't be removed with a baster so I don't think it's cyano of any sort and it's not diatoms. It's all over this rock but only on this rock.

 

[Bfragale]

If it doesn’t blow off, it could be red coraline algae?

 

[GillMeister]

If it doesn’t blow off, it could be red coraline algae?

I hope so. It doesn't have that plating structure usually seen with coralline, though. I've never had red coralline so I wouldn't know whatit looks like. Only pink, purple and a little bit of green. Time to check out some images.

Hello Google, here I come.