White tubes growing from the rock

[Essdee]

Any IDs on these white tubes? There's quite a few..

 

[ISpeakForTheSeas]

Sponges - most likely harmless filter-feeders.

 

[Quintin]

I have the same, no clue.
Assuming some type of sponge as they only grow in shade.

 

[Essdee]

Ah that's great news. Thanks

 

[Reefkeepers Archive]

Agree with @ISpeakForTheSeas

 

[DJC]

Agreed I have a cluster of 3 in my tank and identified them as sponges also

You got a great amount of growth there
This means your tank is healthy