"Canada’s Nautilus aiming to start marine mining in 2019 despite enviro concerns", 1 June 2018

Deep-sea mining is yet to become a major activity, and not much is known about undersea mineral deposits...environmentalists have issued strong warnings about the potential threats that could be posed to marine ecosystems and the long-lasting damage that could result from disturbing seafloors through dredging and cutting, as well as mining...

One mining company that seems to be making headway as a major role-player in deep-sea mining is Canada-headquartered Nautilus Minerals. The company is developing and commissioning deep-sea mining equipment, which it calls seafloor production tools...with final delivery scheduled for March 2019...opposed to the activity, the Deep Sea Mining Campaign, states that there is a high level of uncertainty about the risks that deep seabed mining poses to marine environments and communities...