Hitchhiker living in my new Xenia

[dcat77]

Any one know what this is. Not sure if it is bristle worms or some kind of brittle star. It looks like several tentacles sticking out of the rock.

 

[spanko]

many arms then it is probably a mini brittle starfish.

 

[ophiura]

It looks like a brittlestar arm - probably a small species.