Tremors?!? What is this?

[adamG]

I bought some live rock, and a piece of coral and it's amazing how much little life I see! Seems as if new creatures form in front of my eyes, but what is this?

I thought it was a leg of a star fish, but it's a worm

 

[herp_mommy]

Bristleworm. Good part of the clean up crew. Wrasses and arrow crabs will eat em

 

[adamG]

Thank you