Do these look familiar

These have been growing in my 30g for a while now, looks like tube worms but just has a velvety green cover on the tips.
Sorry about the pic, this camera has got to go!!!!

 

Yes I had them in my old tank, I dont know what they are though

Try to sell them & see if you have any takers

 

All I know is they are a calcerous macro algae. I don't know the species name though.

 

I have those re-appear in my tank about once every nine months. They grow for a while and then disappear...

-JB

 

I have them in my tank as well, thanks for the answer Tibbs2

 

From browsing the web, it looks like Neomeris annulata

 

Thanks for the info guys!!

I wasn't sure if it was some thing to keep an eye on or just to let it be.