White egg looking thing

[pop.reef]

Can anyone help me ID these white egg looking things growing behind a Ricordea Florida? Is it some kind of pest mushroom or what? It’s on a loose piece of rock so I will be able just to take out that piece as soon as the Ricordea leaves it, which it is about to. Hope you can help. Thanks

 

[Jdubyo]

Looks like sponge to me

 

[Phil D.]

Pineapple Sponge

 

[ScottR]

+1 pineapple sponge. Commonly seen in newer tanks.

 

[pop.reef]

Thanks. That’s what I thought. Should I remove them?

 

[Pistol Peet]

Can anyone help me ID these white egg looking things growing behind a Ricordea Florida? Is it some kind of pest mushroom or what? It’s on a loose piece of rock so I will be able just to take out that piece as soon as the Ricordea leaves it, which it is about to. Hope you can help. Thanks

Sponge it's good filter feeder