ID fast please!

[bluedevils38]

Ok so I accquired alot of coral from a friend who has a beautiful 500 gallon reef and I got a lot and I mean a lot of polyps and green sea Matt for 75 dollars and there was like these centipede looking things on it! What are they and are they bad or good! Thanks

 

[powdermonkey]

Look up bristle worm. Or touch it and tell me if it stings. Ok, don't touch it. Hard to see in the pic.

 

[bluedevils38]

Well funny story but right when I was putting it in my tank I saw it and picked it up and it was on my finger but it didn't sting at all!