Worm ID help!

[ankjones]

This guy came crawling out of my rock yesterday and has just been hanging there growing quite rapidly. I've looked at many worm ID's and havent seen this guy anywhere.
Thanks for the input

 

[wrightme43]

I dont know the answer, just didnt want you to think nobody cared. sorry. Steve

 

[kylem]

It looks to me like the arm of some brittle star...look up in starfish. sure its not hiding in the rock?

 

[ankjones]

positive its not a brittle star, this guys just died today, he began turning a clearish white, and fell out of the rock. I assume he died because of the ammonia level. My tank is still new, its only been cycling about a week. But today I spotted two more coming out of totally different rocks...I am really curious about these guys, can somebody help!?

 

[bri7969]

it is a peanut worm

 

[NaH2O]

I'm not sure what type of worm it is. I'll see what I can find - have you been able to see it's "head"? If so, that may be a help. Here is a nice site - if you click on Family Key (same with the Genus section), you then answer questions to help analyse the family of worm you have. If you are unsure of what the question is/what the morphology means, simply click on the question and it will show you. Polychaete Identification.

 

[cdeakle]

Could be some kind of flatworm??

 

[NaH2O]

I don't think this is a flatworm, mainly because the body appears to be segmented and has little bristley legs.

For reference, here is a link to Sipuncula aka Peanut Worm

Here is another link: Polychaete Annelid Identification, or "You can always tell a bristleworm"