Need help identifying what came in my live rock.

[Invictus]

Newbie here starting up my first tank. Bought some live rock and tank has been cycling for about 2 weeks. Today I was taking a good look at the rocks and found something living in it. Can anyone tell me what it could be?

 

[KJ]

Cucumber and Polychaete worm.

 

[Invictus]

Thank you KJ. Are these worms ok to have in the tank if not what do I do to get rid of it?

 

[KJ]

@Tahoe61 @Lionfish Lair

 

[KJ]

Are these worms ok to have in the tank if not what do I do to get rid of it?

It's hard to tell from this picture if its good or bad.