BTW, I caught my pom pom crab snacking on the tentacles of one of the terebellid worms the other day. I tried to get pictures, but they didn't come out well enough to make out what's going on. (I need to clean the glass after leaving it go while there were snail egg pods on it.) The crab was munching the ends of the tentacles like they were spaghetti. He was eating both kinds of tentacles, the long striped sticky ones that forage for food, and the shorter stiffer brown ones the function of which I have yet to determine.
Watch these things for a while, they're really cool! Feed them a bit of flake food or really just about anything.
BTW, _Eric_'s pictures are of exactly the sort of terebellid worm I have. They are *not* cirratulid worms. Cirratulid worms have mistakenly been called spaghetti worms too, but they are very different from terebellid worms. Cirratulid worms only have two feeding tentacles for the most obvious example.
--cn