White boogers? ID

[NathanMI]

What are these?

 

[ErinCahir]

Looks like a pineapple sponge to me. Harmless hitchhiker.

 

[chichimom79]

+1 Erin!

 

[NathanMI]

Pineapple sponge? I killed him! :-(

I had these all over my tubing in my old 40g reef so I don't want then everywhere again. But I'll leave them next time I guess!
Thank you!

 

[chichimom79]

They will multiply rapidly if you have excess nutrients in your system.

 

[NathanMI]

No problems in this tank yet.
I bought this live abouy rock two weeks ago and just noticed them today.