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!

http://i562.photobucket.com/albums/ss69/SEQdivespots/Anything/worm_zpsf8e56101.jpg

[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.