Worm ID pls?

[TeeJay87]

Came in on TBS live rock/sand from the Gulf. I have atleast 2 sizable worms like this. Has come out of the sand atleast 6 or 8 inches; so it’s probably much longer. It has 5 antenna/tentacles coming out from the top of the head, which is what I’ve noticed on Bobbit worms. However, I’ve never seen the Bobbit worm fangs outstretched. Anyone know what this is for sure?

 

[ISpeakForTheSeas]

Yeah, the five antennae are characteristic of Eunice worms (the Bobbit Worm being Eunice aphroditois), so it likely is related to the bobbit. I'm afraid I'm not much help beyond that at the moment, but - if I recall correctly - some Eunice spp. are predatory like the bobbit while others are harmless/good CUC.