Pest ID Request

[dpfriedman]

Noticed some heads on my hammer colonies dying off so pulled them out to inspect and found these…

What are they and is their a dip I can use to kill these things?

The gray worms like things are soft and I was able to scrub them off so I know they are not vermentid snails.

 

[Cthulukelele]

Serpent stars are usually friendly detritivores. That's the black thing. I'd assume those worms are just some harmless detritivore worm as well