Report OverviewMarine mining is a relatively new mineral retrieval process that takes place on the ocean floor. Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at 1,400 to 3,700 metres below the oceans surface.The global Marine Mining market size was estimated at USD 551.30 million in 2023 and is projected to reach USD 2739.68 m..