Sponge possibly ? Please help

[Glenng78]

White stringy growths on my rock. Possibly strangling some of my favorite zoas.

 

[vetteguy53081]

Sponge , yes

 

[ndrwater]

+1. Sponge for sure

 

[Glenng78]

Harmful ? Or good ? It looks like crap, and I want to say it is strangling my rastas

 

[Glenng78]

Can I remove it ?

 

[Lovemyreef2015]

Can I remove it ?

Sponge is usually a harmless filter feeder but when growing around corals can start to grow over them and suffocate them. You can take a tooth brush and softly brush them off.