Are these little sponges?

[RYAGE]

Hi there.

I’ve got thousands of these little blobs growing in the dark spots of my tank. I assume they’re some sort of sponge, but I’m curious if anyone can give me an idea of what kind they are as I’ve not had much luck IDing them.

thanks!!!

 

[Obsessed with fish]

They look like pineapple sponges to me, harmless.

 

[RYAGE]

They look like pineapple sponges to me, harmless.

Looking them up, I think you’re right! Thanks friend.

 

[AydenLincoln]

Definitely pineapple sponges so cute! I have some too.