Can someone tell me what this is

[saynomoore]

New rock I bought and it has this on it too anyone?
There are several on the rock

Seem to be 5-8 thin tentacles. (light greenish tentacles with intermittent black stripes.

Its source (base) is hidden inside of the live rock. The thin spaghetti-like tentacles undulate frequently, stretching over the live rock, and waving in the current

 

[i cant think]

New rock I bought and it has this on it too anyone?
There are several on the rock

Seem to be 5-8 thin tentacles. (light greenish tentacles with intermittent black stripes.

Its source (base) is hidden inside of the live rock. The thin spaghetti-like tentacles undulate frequently, stretching over the live rock, and waving in the current

Looks like either spinoid or spaghetti worm.
If it’s staying there then I ruled out the bristle starfish/serpent stars. It could be a feather duster star but I doubt it.

 

[saynomoore]

Here is another picture

 

[i cant think]

Here is another picture

That is nightmare fuel - I’m going with spaghetti worms

 

[Utubereefer]