Thoughts on this?

[Titleist1964]

I saw this on the back portion of my tank the other day, thought Mayne it was and algea of some kind. But today found it on the front of the glass, moving slowly.

 

[vetteguy53081]

It’s either flagellate (not Dino flagellate) or macro algae) but hard to tell which under your heavy blue lighting
Pics always best under white lighting

 

[EeyoreIsMySpiritAnimal]

Check out this thread. On page 2, I linked to a similar, earlier thread.

Sudden single spidery algae monster

This popped up and grew exponentially within hours. It looks and feels like algae (wipes off easy), but the sudden onset is weird! I haven't cleaned the tank in several weeks, so there's a small bit of normal film algae, but no problems or algae anywhere else. Any insight? Thank you!

www.reef2reef.com