What is this??

[Reefermadness13]

I bought a few yumas on some live rock a while back. I dipped the entire thing to ensure there were no pests. Today while feeding mysis, I noticed that there are quite a few of those pest snails that have the long thin shells, some clear looking worms, a clam of some sort in one of the crevices, a brittle star, and something in a hole that I dont know what it is. That's what is in the pictures. My question is, should I try to dip it again? Should I throw it away? If so, how do I get the yumas and other mushrooms off the rock. There is also a small brittle star that lives in the rock that I would like to save if possible.

 

[Gareth elliott]

Other Mushrooms look like discoma(spelled wrong lol)

Snails do not look like anything predatory.
Same with the worms. Can remove anything you dont like with a scalpel.

I find getting yumas off a rock and onto another iffy, but this might be my own experience.