What is this green bump on my frag plug?

[hannernanner]

Hi all,
Cleaning the tank today and I noticed this thing on one of my frag plugs. I've had the coral a while, and definitely didn't notice this last time I was cleaning...any idea what it is??

 

[Spare time]

Sponge! I like that species

 

[kagisexton]

Looks like a pineapple sponge

 

[WheatToast]

Looks like a pineapple sponge

I agree this is a sponge, though I do not believe it is a Pineapple sponge. The "tube" does not appear very fuzzy and the coloration is yellow, not cream colored (unlike a Pineapple sponge).

 

[Spare time]

I agree this is a sponge, though I do not believe it is a Pineapple sponge. The "tube" does not appear very fuzzy and the coloration is yellow, not cream colored (unlike a Pineapple sponge).

Yeah these ones form ball like appearances in darker areas of the tank

 

[Saltyreef]

 

[GHOSTLY]

That’s a pineapple sponge. Good lil guy

 

[Spare time]

It is not a pineapple sponge. I am 100% confident of that. I have had both in my tank

 

[Saltyreef]

Its a leucandra sponge.

Pineapple sponges are much smaller and usually white.
You would know if you had pineapple sponges lol.