Unknown Hitchhikers?

[DeanSwinf]

Any advice would be appreciated? I can't seem to find any info about these guys online... Loads of them hiding in the rocks, purple-ish tentacles everywhere. And found this 7-legged critter also! They don't seem to be a problem?

 

[Galeno rocha]

First one seems like a bristleworm, but i'm not positive.

Second looks like a Brittle Starfish