Hitchhiker looking for I.D.

[Air Cooled V.W.]

Hello, I just recieved some lr from a buddy. It's been in for a few days now. I found my Brittle Star wrapping around this guy and it looked like it was dead. When I pulled it out of the tank and put it in a container it started to move a little bit..

Any idea or help would be appreciated. Thanks

 

[Air Cooled V.W.]

bump

 

[LeslieH]

Looks like a really mutilated sea pen.