The Hidden Gem, commissioned by Canadian miner The Metals Company, has just returned from eight weeks of test mining in the Clarion Clipperton Zone between México and Hawaii. One of the biggest vessels of its type in the world, the ship planned to mine 3,600 tonnes of polymetallic nodules from the seafloor in a trial that could pave the way for full scale commercial mining. 

Greenpeace México activists met The Hidden Gem in kayaks holding ‘Stop Deep Sea Mining’ banners while Greenpeace Aotearoa campaigner James Hita delivered a message to the captain of the Hidden Gem via radio