7 armed brittle star

[SpilledSalt]

I got a medium sized brittle star as a hitch hiker , the best I can tell it resembles a fancy brittle star, but it stays hidden in holes in my rock with a few arms hanging out at all times. I have only seen it fully once. It has seven arms. What is it. No photo op yet as it stays hidden. Any clue to what it is?

 

[SpilledSalt]

The best I can due for now

 

[scadsobees]

Little brittle stars are common in live rock. Chances are it has a few siblings in there. Part of the clean up crew

 

[SpilledSalt]

It is about 3 inches from arm tip to arm tip

 

[SushiGirl]

Mini brittle star, as said a common hitchhiker and good for cleanup.