What is it?

[soapy]

Weird worm, anybody know what it is? It usually looks like a grey tube and is mainly nocturnal. 3mm in diameter and several centimetres long. One end stays put most of the time in its rock hole.

http://i882.photobucket.com/albums/ac29/soapy_photos/ufo_worm_IMG_2926_zps7oweto6n.jpg

[gobytron]

Is that not a Eunice worm

http://www.advancedaquarist.com/blog/if-you-thought-big-bristleworms-were-scary

possibly also a peanut worm, but I don't think I've ever seen more than their tentacles out of their hole.

[soapy]

Is that not a Eunice worm

http://www.advancedaquarist.com/blog/if-you-thought-big-bristleworms-were-scary

I don't think so, it is pretty much smooth, no clear segment sections or bristles. Hope not anyway...

[gobytron]

I once bought a bunch of really fresh Caribbean LR from King Eds.

Bought same day it arrived.

It had a ton of peanut worms that actually looked really similar, they just never came out of their holes like that.

Kind of like a fatter, uglier fan worm.

[soapy]

I thought of Peanut worm before and thought no the shape is not right. But now that you mentioned it I went back to google and I think it is a peanut worm.

http://chucksaddiction.thefishestate.net/hitchworms.html

http://melevsreef.com/blogs/admin?page=3

http://www.captivereefs.com/forum/invert-index/peanut-worms-sipunculans-20656/#.VsyyZulbo_g

[soapy]

Here is a better link for those interested:

https://reefbuilders.com/2015/05/11/peanut-worms-reef-aquarium/

[soapy]

So much to learn about these guys:

http://spongebob.wikia.com/wiki/Peanut_Worms

[gobytron]

good read on the reef builders article.

I now know there is such a thing as a penis worm.

[soapy]

good read on the reef builders article.

I now know there is such a thing as a penis worm.

That pretty much puts an end to the idea of nude reef keeping...

[gobytron]

yeah.

my basement tenant put the kaibosh on that a long time ago.