Cleaning my sump and found this..?

[208Reefer]

Wassup Reefers,
Cleaning my sump today and found this little thing on my skimmer. I have only seen one once before in my tank a hand full of months ago and it was between a frag shelf and the glass. (which I got rid of) It looks almost like a vein or root that definitely gets larger over time. Doesn’t seem to move that I’ve noticed. Anyone have any idea what it is or what I should do with it?

 

[Little c big D]

Following.

 

[Poof No Eyebrows]

Sponge?

 

[Mikedawg]

Might want to research spaghetti worm

 

[GHOSTLY]

Some sort of tunicate in my opinion. The tube-like body with attachments might be tunicate

 

[Tired]

Not a spaghetti worm, those look like a worm with spaghetti attached.

Either sponge or tunicate. If you poke it, does it do anything? Harmless either way, just a filter-feeder.

 

[Onewolf]

It's the pre-emergent form of the face hugger from Aliens.

Sleep well...

 

[jeffchapok]

It's a harmless sponge

 

[Just John]

I have had those. It will grow into this/these. Harmless as the others were saying, but could really start to spread like these did depending on how much you feed. I had an opportunity to not feed for a week and they all died.

 

[Goaway]

Spegetti sponge is one common name for it. I never can remember the other names.
Edit: white lace sponge, enjoy!