Does it still have its crown, or did it shed that off so it looks like a normal worm?
Well, I'm not optimistic, I think its dead. I saw the hermit crabs kind of huddled around the end of the tube last night. The "head" part where the feathers attach is lying in the sand a few inches from the end of the tube. I'm not sure if when they shed the crown if the whole part comes off, or if its just the feathery parts. So, its either headless and featherless and hiding in the tank someplace, or its dead and hte hermits ate most of it last night.