These worms were collected by Alexander Semenov on various research expeditions, in locations like the Great Barrier Reef. I wonder how different—or similar—life could be under the oceans of Jupiter's moon Europa. If there's any life down there, that is.
The organisms are various species of marine worms, collected then photographed alive in a lab. Catching good looks at the worms in the wild is difficult, as they remain hidden beneath stones and reefs most of the time. When they come out they are likely to be eaten pretty quickly by a fish.
They look like something you'd feed a Jedi to—only smaller.
Head over the Alexander Semenov's Flickr page to see more insane undersea wildlife.