Anybody know what this is?

[jjntm]

was nothing there 3 weeks ago, when closed it looks like a zoa or paly polyp... open it's like a cross between a ricodia and clear tentacles similar to a torch coral... need to figure out if I let it continue in tank or cut it off the rock and chuck it...

when closed


when open

[Proteus]

Ball tip nem. But more related to mushrooms. Harmless and neat

[jjntm]

Thanks you! atleast I know not to worry, they don't sound to be very invasive...Appreciate the response.