What is this?

[TimReef]

The image shows a lot of blue lighting, the extra white “glare” on the critter is actually black stripes. With a white body

 

[I luv coralz]

Looks like a brittle star

 

[Lovemyreef2015]

I agree, it's a micro brittle star. They are a good part of the cuc. We have hundreds in our reef tank. I like seeing their little arms poke out of the live rock.

 

[TimReef]

Looks like a brittle star

Should I have any concerns?

 

[DSC reef]

Brittle stars are good members of the cuc