Can you ID this for me?

[SirKevinD]

Hello fellow reefers and aquarists. I have found these guys exploding throughout my tank recently but I can not figure out what they are. Maybe someone can shed some light on it for me.

 

[YHSublime]

Hard to tell from the pic, looks like a pineapple sponge though

 

[SirKevinD]

Thanks for the quick response! Are these ok in my tank?

 

[YHSublime]

Thanks for the quick response! Are these ok in my tank?

Don't quote me, do a google search to make sure that's what it is.

Yeah, they are ok, although they have been known to clog pipes and tubing, so keep an eye on that.

 

[SirKevinD]

Ok well thanks. I googles it and that's what it is. I have no sump right now so I'm to concerned with them clogging anything up. Pretty cool little guys, as my RODI filter has got more dirty (just ordered a new filter kit from BRS) they have been popping up in numbers so I figure they're feeding off phosphates or something like that.