Worm ID please!!!!!!

[theyangman]

Can I get a hand with an ID please? I shot a video of it for easier viewing.

https://www.youtube.com/watch?v=09i9bsemslA

 

[Sugar Magnolia]

It's a harmless nemertean...ribbon worm. Beneficial detrivore.

 

[Charles Raabe]

Not sure about it being harmless, not much is known per their food sources and as with most all marine families, some members may be harmful while others be harmless. I would leave it though and just keep an eye on things.