Help with the ID of this worm

[JasonAM]

I walked by my aquarium the other day and noticed this guy hanging on the side of the glass. I had recently bought some corals so it had to come in on one of them.

Any help satisfying my interest of what this creature was would be appreciated.

Thank you in advance.

 

[JasonAM]

Nobody knows?

 

[pagojoe]

I'm neither a worm expert nor a sea cucumber expert, but it might be a Synaptula species or something similar. (Disregard the caption name Bursatella leachii, that is an error. It should say Synaptula hydriformis.)

https://www.sms.si.edu/irlspec/Synaptula_hydriformis.htm

 

[JasonAM]

Thank you, I think it may have been a medusa worm which you have lead me to the information. I appreciate it.