What is this?

[yoshiReefer]

I took this zoa off and brushed most if it off it was like big fluffy and it held back a bit but now it seems to be strangling one of the heads keeping it from opening. The 2nd pic is same stuff on the same rock a few in from the frag and some on the sand bed to the front left of the frogspawn.

I grabbed 2 clumps of it out of the sand bed earlier and it held the sand everything on the sand together not sure what it is.

 

[saltwaterfish.com Verified Sponsor]

Looks like spaghetti sponge, if it moves then it might be spaghetti worms. Normally harmless but if it starts to cover corals it can be a nuisance.

 

[yoshiReefer]

Looks like spaghetti sponge, if it moves then it might be spaghetti worms. Normally harmless but if it starts to cover corals it can be a nuisance.

I have a lot of pineapple sponges, so a sponge would make sense. Do those 2 regularly come together in tanks?

 

[saltwaterfish.com Verified Sponsor]

Yes pineapple sponge and spaghetti sponge are very common tank hitchhikers.

 

[kevgib67]

Do you have a seahare? Their eggs look a lot like that.