Need an ID on a potential pest!

[jkush710]

Hi guys, not completely sure if this is okay to leave in the tank, but I don't have much of an option as its inside the rock. I see about 5 tentacles coming out different places on the rock. Best picture I can get!


Thanks a lot!

 

[Wiz]

Hard to tell from the pic. But it looks like a micro brittle and is beneficial.

 

[prdubois]

Serpent Star. Not bad .
http://www.saltwaterfish.com/product-serpent-starfish

 

[Blue Lip]

Micro bristol for sure@