Algae ID

[iTread]

Any idea what kind of algae this is? I don't think it's cyanobacteria.
It's kind of maroon/burgundy under blues.
I think my emerald crabs love it, as it's not on the rock they hang out on and they seem to pick at it.

 

[wesman42]

It looks like red cyano to me. I know you said it's not cyano, but how do you know?

 

[Labridaedicted]

Could be the start of a red turf algae. It kind of makes that mat before it gets the wiry growth.