ID please

[Scharlork]

Tiny worm on my glass tank

 

[Tahoe61]

Hard to say based on the unknowns size and location. If you can remove it and get a better image when able that would help but for now I would not be too concerned. Have you added any new corals lately and if so what?

 

[Scharlork]

Size 5mm life in refugium. Tank still cycling on week 2.