Please ID what's is growing on this rock

[Bob Escher]

see this growing on my live rock and it's only on this one from my LFS

Thanks

 

[KJ]

Look like Bryozoan filter feeder.

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[Tahoe61]

I am thinking sponge, and harmless.

 

[Bob Escher]

Here's a closer picture
Thanks guys
Those are not tentacles that I can tell

 

[KJ]

Sponge.

 

[KJ]

Thanks guys

 

[Bob Escher]

Oops thanks guys

 

[4FordFamily]

Sponge I agree. It's a good thing!