I did contact the coral company I ordered from and they advised it was a tube worm of some sort until I advised what our community here @ R2R had concluded they apologised that it had been missed. Not to sure what I’m looking for as I’ve never encountered this type before but looking at the pictures and in the tank itself I think it’s dead too as a precaution I may put some glue on the opening just to be safe. Thank you for the info very informative and helpfulThese larger ones I have never seen them cast a mucus net. They ty;ically have small antennae that will stick out of the opening. There is usually a cap like a big tubo snail has that covers the opening.
If there is no "cap" on the tube, it is dead.