Hitchhiker ID please

[RC88]

Hi guys - looking for help to ID this hitchhiker. (The red worm crawling out of the live rock). Would like to know if safe and friendly.

Many thanks,

 

[fishywishy]

Looks like a small bristle worm but it’s hard to tell. They are harmless.

 

[reefer2/19/24]

I think I see an Amphiopod and a Bristle worm both good guys.