What are these white spongy looking things?

[coastalnanoreef]

I saw one of these on a torch I got in. I didn’t really see it until a couple days after I had it in the tank. But now they are in a couple different places. Does anyone know what they are?

 

[Goaway]

Pineape sponges. Just helping your tank cycle

 

[The Lumpster]

Yep. Pineapple sponges. Good things. Mine only appear in the dark spaces in my tank. I have a hundred of them in my sump.