Tube like

[Enzo14]

newly set up tank. Anyone know what these are? White tube like, I have a few of them on my live rock.

Thanks

 

[ISpeakForTheSeas]

Looks like Pineapple Sponges (genus Sycon) - harmless filter feeders; they typically boom then bust in population and go away on their own.

 

[Enzo14]

Looks like Pineapple Sponges (genus Sycon) - harmless filter feeders; they typically boom then bust in population and go away on their own.

Thanks for the quick reply. Google searched that and it’s exactly pineapple sponges. Appreciate it

 

[vetteguy53081]

Oftensilicates are cause and can be from new rock, new sand, from tap water if used and expired or leaking Di Resin cartridges.
These are short lived and will dissipate as silicates reduce. You can peel them off with the edge of a credit card into a net if they are too many
They are not harmful and favor algae if they get any