found this thing under some live rock i was taking to the LFS to sell. I have NO idea what in the world it is, its some kind of worm-ish creature. the narrow end is its mouth/head and it extends. when fully extended it has a ring of what appear to be teeth, they resemble white hairs. the LFS said it was a harmless detrivore. so i threw it in my fuge to watch it for a bit. any info would be great, a name would be even better.
here is another shot
here is another shot