Monsters of the deep

They look like monsters from another planet. But far from inhabiting some alien world light-years from ours, these frightening looking creatures exist at the bottom of Earth's deepest oceans.

Astonishing new pictures of Polychaetes, or scale worms, show how they have evolved to survive the intense pressures more than 1,000 meters below the water's surface, where the sun's rays never penetrate.