How do boneworms dissolve bones?

[embed]https://www.youtube.com/watch?v=URi8KccVkks[/embed] When whales die, they fall to the floor of the sea. As described in the above video from the Monterey Bay Aquarium Research Institute, these "whalefalls" provide a huge influx of food to a wide variety of animals and microbes. Not only is the flesh devoured, but the bones are consumed as well, by the aptly named "boneworms." Many species of boneworms (Osedax worms) help make the entire whale skeleton disappear in less than a decade. T