Worm ID

[Sallycarle]

I was cleaning my sand bed and found these two. They lead with the small end and looks like some tiny little feather type thing comes out and then quickly goes back in. Any help would be appreciated. Thanks!!!!

 

[WheatToast]

Peanut worm (Sipuncula sp.)? These are harmless detritivores.

 

[Sallycarle]

Peanut worm (Sipuncula sp.)? These are harmless detritivores.

Thank you!!!! I was hoping they were not something bad.