The team on the expedition vessel Nautilus has posted some amazing video of a Halitrephes maasi jellyfish. It was filmed by ROV at a depth of 1225m (4019 ft) in the Revillagigedo Archipelago off Baja California, Mexico.
Robert Ballard and the Nautilus Live expedition is over half way through their six-month 2015 season and recently they revisited the Rosebud whale fall from 2011. The finback whale carcass was originally deposited on the ocean floor off San Diego after being struck by a ship and killed. The opportunity to study a whale carcass at depth was, and still is, rare and exciting.