Red worm-like creature on shell of scarlet crab Hitchhiker ID

[Labora]

There's some red worm like creature less than an inch long on shell of scarlet crab would like to know if it's a good or bad hitchhiker?

 

[EeyoreIsMySpiritAnimal]

Can you get a pic under white light? It looks like it might be a hair worm epitoke but it's hard to tell.

 

[Labora]

I figured it out it's a spaghetti worm

 

[EeyoreIsMySpiritAnimal]

I figured it out it's a spaghetti worm

Hair worm.