Critter ID

[Weaverjay101]

Found this critter in my substrate. Has a clear body with black line. Burrows throughout the substrate. Just wondering what it is an will it become food for my sand sifting goby?

 

[BaysEndReef]

Maybe a Dorvilleidae worm? Can't really tell from the video. That's my guess.

 

[Weaverjay101]

Maybe a Dorvilleidae worm? Can't really tell from the video. That's my guess.

Thanks for the help! Compared it to some pictures and I think you're right

 

[s0mthinG]

The 'black line' appears to be a digestive tract of sorts.