Sponge under M Undata?

[selje]

Picked up a Montipora Undata today. Pick taken straight after dipping



And I found this underneath. Someone who know what this is? Is it some kind of sponge? The surface was kinda hard.





Click the pictures to enlarge. Hope some of you know what this is.

 

[RedSea Aviad]

Hi,
It looks to me like some sort of a Tunicate or a Bryozoa.
Hope it helps,
Aviad.

 

[allsps40]

Yep it a sponge, good to have and will not hurt the coral.