Is this a basket starfish?

[ojonas81]

A couple of days ago I found a new "creature" in my tank. I don't know what it is but looks like a basket starfish or similar. It is nestled around rocks that originally came from TBS however those rocks have been in the tank for well over 16 months now and have never seen this before.

Can anyone confirm what it is (dead center in the picture below)? Thanks!

 

[Calappidae]

Looks like one,

They're very delicate like a feather star (both being crinoids)

 

[Bongo Shrimp]

That is the feeding appendage of a sea cucumber which lives in rocks. You can see a couple other examples here: http://www.wetwebmedia.com/cukeidf3.htm