Help with identifying these live rock hitchhikers from KPA

[EngineMonkey]

I got some new live rock from KPA and I’d like help identifying some of the hitchhikers so I know what’s good/bad. I wasn’t able to positively identify these from the stickies.

 

[Tamberav]

Red one looks like a spaghetti type worm. Crab looks like a bad one. The big boy looks like maybe some sort of Eunice worm.

I’d probably just put the spaghetti back and toss the rest. You probably have plenty of bristle worms. I can’t tell what they are from the pics, the clear table makes it difficult to see.

 

[BristleWormHater]

1. Spaghetti worm (good)
2. Gorilla crab or some other predatory crab, mayba from the xanthidae family (bad),
3. bristleworm(tolerable)
4. Isopod of somekind(my best guess) (not sure if it's good or bad)
5. I don't know
@ISpeakForTheSeas