ID for worm from live rock?

[Saltliquid]

Hey guys, the white worm in appearance filter feeding, can some one tell me the Latin name, or a way to find its Latin name please, i can't remember what it's called!

 

[Saltliquid]

So no help on this?

 

[Calappidae]

Doe's he look/behave like anything listed here?
http://www.chucksaddiction.com/hitchworms.html

 

[Saltliquid]

Thanks mate, I will have a look.

 

[cloak]

Digitate hydroid perhaps?

 

[Saltliquid]

Thanks mate it could be the one.