Is this hydroids or what?

[InfinitePolyps]

This Ultron Favia came with these white stringy things. They’ve started to grow over the rock and I’m wondering if they’re hydroids or something else?

 

[Tuan’s Reef]

I think its a sponge. is it like a hard tube?

 

[Jekyl]

@vetteguy53081

 

[vetteguy53081]

Looks like tube worms
Are there little fans coming out occasionally?

 

[JGT]

+1 sponge

 

[InfinitePolyps]

Looks like tube worms
Are there little fans coming out occasionally?

Thanks, no fans, they’re very tiny and thin

 

[InfinitePolyps]

I think its a sponge. is it like a hard tube?

Not super hard, they flow in the current a little, Although I touched them and broke one in half easily. I didn’t know that was a sponge? I’ve seen tons of pineapple sponges but didn’t know they come in this white stringy shape?

 

[Tuan’s Reef]

yep, your description is a sponge. They should be easy to peel off.

 

[InfinitePolyps]

yep, your description is a sponge. They should be easy to peel off.

Thanks! They’re harmless then tight?

 

[Tuan’s Reef]

Sponge is harmless yes.