Some Kind of Red Worm, Help indentify

I just got this coral in today, and I noticed it has some sort of red worm on it, there is only a hand full of them and each pic, looks like something else. My first thought was flatworms, but they are on zoanthids, NOT sps. Another pic of them looks like red ribbon worms and another looks like a red nudibranch, So I have no clue what it is, maybe some of you all with more experience with worms could help Identify it, Thanks.....

 

They are not bristleworms. I just dipped the whole rock, and pulled off as many as I could find.

 

can you get a clear photo of them out of the water

 

It was suggested to me that it was some type of larvae possibly.