I am guessing the writers may have once seen this guy before.
This is a Long Brisile Eunice - an Elongated Worm that is found in small burrows in rubble and other debris. The 5 tentacles are extended to feed at night as the Eunice sticks the its head out of the burrow.
This one was found during a night dive at Phil Foster Park in West Palm Beach, Florida. The place is a gold mine during the day and it is no different at night.
First one I had ever seen, so of course we saw three on this dive.

And you know what is funny - this is not the best find on this dive. But I'll post that one later once I find out what the hell it is.
Enjoy,
M