What could this be?

[Melloron0107]

First please excuse my hands. im a avid crossfitter and it was a hard week. Now to the main question what could this critter I found in my sand be. It seemed to be moving when took it out and then slowly stopped. Thanks in advance

 

[mtfish]

Polycheate. Good part of your clean up crew.

 

[PeterLL]

Spaghetti worm - friend

 

[Melloron0107]

Dang now I wish I wouldn't have flushed it. Oh well I guess where there's 1 there's more.