ID please, small white (snail) looking things all over the glass.

[JoeJoe822]

 

[LeonThePeon]

Limpets

 

[DSC reef]

+1 on the limpets, good part of the clean up crew

 

[JoeJoe822]

Ok thanks guys, thought they might be somekind of pest.
Do you have any recommendations to treat these tube worms? There all over my rock, but only afew I ever see come out like this..

 

[DSC reef]

Those look like colonial hydroids. I'd remove the rock and scrape them off in a separate bucket. Make sure you get them all off.

 

[Lovemyreef2015]

+1 on colonial hydriods. Get them out before they start spreading. They come off pretty easy. We had some come on a piece of live rock in my mother in laws tank and we just picked them off. Like said above, make sure you get them all so they don't come back.

 

[sfin52]

Limpets.

 

[sfin52]

2nd pic hydroids remove

 

[Kamden Uelton]

Cowries eat Hydroids make sure you get Money Cowries (Monetaria moneta)

 

[JoeJoe822]

Thanks for all the replies! These things are literally all over every rock, even on snails shells.

 

[Michael Llabona]

What's the difference between yellow polyps and those colonial hydroids?

 

[Luna]

What are colonial hydroids?

 

[Jguido1987]

I was reading this thread and am completely confused. Hydroids? Are those the “yellow polyp looking things” or are they the tube worm looking thing. My tank has a bunch of those 1/4 inch maybe even smaller sized tube worms. I always was under the impression they were good and helped w filtration being filter feeders. And googling hydroids just comes up with about 1000 different types.