Please Help Id This

[carold]

I found this in my tank this morning after having a thorough clean yesterday. Any ideas what it is and whether it should stay or go?

I currently have a maroon clown, orchid dotty back and silver bellied yellow wrasse. Also sand sifting starfish (looks a bit like one of it's legs but it isn't), Fireshrimp, cleaner shrimp, pink spiny cucumber, red and blue legged hermits, turbo snails and trochus snails.

I also have a couple of corals

Any suggestions as to what this is and whether good or bad would be very useful please

Thanks

 

[Ludwig Venter]

I don't keep marines, but If I have to guess, I'd say it's some sort of mussel worm, which I sometimes find on the corals when I go searching for reef bait..... Fish eat it.