Does coraline glow in blue lights?

[ceruleanspiral]

I have a few patches of reddish in the curve/corners of my Biocube as well as 2-3 small patches on my rocks. I have scrubbed it with a toothbrush (I had cyano before and it peeled off) and it has not budged. I touched it and it just feels like the rock around it, not slimy. It glows a teeny bit in the blues. Is that coraline or something else?

 

[Bryson.bobby]

Yes. Coraline can grow in blue light.