Unknown growth in tank. Help ID!!!

[Blemmons]

These brown flower polyps are growing all over our live rock and now on some of our corals. They are killing them slowly. I have been unable to get rid of them. Any ideas on what they are or how to get rid of them?

 

[Sugar Magnolia]

Hard to tell from the pic but it may be colonial hydroids, which fits your description. They pack a powerful sting. Unfortunately I know of no biological control for them.

 

[oldbones]

Are they Blue Clove Polyps? D2Mini just declared war on his, late in this thread.

http://www.reefcentral.com/forums/showthread.php?t=2153276&highlight=blue+clove+polyps

 

[Sugar Magnolia]

Yes, they could also be clove polyps. Those things spread by broadcast spawning so they can take over very easily.

A closer, clearer image would help.

 

[Blemmons]

I will get a clearer age up asap. Thanks for the fast responses.

 

[Sk8r]

They're too distinctly xenia-like in shape to be hydroids---I think. I've never seen hydroids under high magnification. Of course I've never seen clove polyps in real life, either.

 

[Blemmons]

Here are some (hopefully) clearer pictures of the brown flower polyps I have in my tank.