White wispy long filamemts ID?

[hrdneglcry]

Can someone tell me what this is? I was going to scrub it off of the rock but not sure what it is. I had some coral that used to have this when it fed but this is just on some live rock. A little hard to see but dead center.

 

[DE FISH]

Clearer pic under white light would help greatly however I’m guessing it’s either bacterial or a sponge. Please post better pics.

 

[hrdneglcry]

I can't I took it down. Might have been a sponge. It probably was. Is that type of sponge harmful or beneficial? I thought it was filamentatous algae. It is a bit spread out. There are a few whisps that I will leave alone.

 

[EeyoreIsMySpiritAnimal]

Looks similar to a vermetid snail web.

 

[hrdneglcry]

Looks similar to a vermetid snail web.

That was probably it. Hopefully I didn't kill them. I assume I can leave that up and it isn't harmful.