Need help to ID this tiny hole dwelling hitchhiker

[eggyplantz]

Hello all, see video attached. I'm curious what this hitchhiker on my new mushroom colony might be. It retracts into a tiny hole if I disturb any of the fine white hairs that are sticking out.

I'd estimate the hairs are 0.25-0.5" long or so and it's a cluster of them. Just curious if it's something to be concerned about.

I've tried searching for similar but it seems like it could be a few different things.

Thanks!

 

[Reefer Brent]

No clue but great quality video!!

 

[mmorrison55]

I think it’s a hydroid

https://tbsaltwater.com/blogs/it-depends/hydroids

 

[eggyplantz]

I think it’s a hydroid

https://tbsaltwater.com/blogs/it-depends/hydroids

Mmm this or spaghetti worm were my top contenders, thanks for the link. Gotta decide whether to seal the hole or not I guess now.

 

[GSPClown94]

Doesn't look like hydroids or a spaghetti worm. Maybe a barnacle?

 

[mumra]

Kinda reminds me of the anthelia on my rocks after I tried killing it by scrubbing it with a wire brush. It's a pest.

I'd get it out of the tank and remove it if you could. .02