What are these?

[Penny]

I found these brown tube like things all over one of my rocks, the picture is horrible, but I couldn't get a better one for the life of me. They have little poofy tops.

 

[Krish]

Hard to tell by the picture, but try and google search either tube worms or feather dusters and see if they look like either of them. If so, they are filter feeders and are good to have.

 

[Scooterman]

looks like feather dusters to me, good sign of life on your rocks!

 

[Scooterman]

Do they look like this?

http://www.etropicals.com/product/prod_Display.cfm?siteid=43&pCatId=1270

 

[Penny]

no they look more like this, after looking up tube worms, but they are darker brown. Either way, looks like they are good things, and not bad. thanks!

 

[Snowboarda42]

look up hydroids too

 

[Kurt_Nelson]

That's what I was thinking too, but the picture is just too fuzzy.

 

[salmonslayer]

Penny, Do they look like this.

 

[Penny]

A better picture

I took this this morning, much better...
I hope these are good things, because this whole rock is covered with them.

 

[Krish]

It looks like some sort of tube worm to me. Guess the others will chime in as well

 

[Reefin']

Definitely a hydroid .....

 

[Penny]

Aren't hydroids really bad?

 

[Herefishyfishy]

They are only bad when they get out of control. like majanos and aptasia

 

[Kurt_Nelson]

Hydroids are bad, but only because they can sting other corals if they get near them. I had a colony by a torch coral a while back. They're gone now! (The hydroids.) Guess they lost that battle. I have other small colonies that just seem to keep to themselves.

If you smear some kalk paste over them, they'll die - but that doesn't really look like it'd work well with the ones you pictured. Mine are in nooks/crannies of my rock, so they "spackle over" quite well!

 

[dj tryrd]

sorry to cut in on ur thread but i was woundering how do you get rid o some hydroids that arent in nooks and crannies

 

[Penny]

yeah, I'd like to know too, and are they dangerous to fish? Thanks.

 

[Herefishyfishy]

Brown hydroids are not that big a deal unlike fire coral:

http://web.archive.org/web/20020815020152/www.animalnetwork.com/fish2/aqfm/1999/mar/wb/default.asp

http://www.wetwebmedia.com/hydrozoanfaqs.htm

http://www.wetwebmedia.com/cnididfaqs.htm