I was intrigued by The Economists' Technology Quarterly segment about ocean technology.
Besides all explorative efforts, we still know relatively little about the oceans. This is about to change with autonomous under water vessels, robots and powerful sensors fueled by the smartphone boom of the last decade.
There's big business to be found in the oceans. Obviously, fishing is one large industry of the seas. But there's more: Estimates say for example that a specific part of the Pacific «holds more nickel, cobalt and manganese than all known terrestrial deposits of those metals put together. The World Bank expects the battery industry’s demand for these, and other, minerals to increase if the transition to clean energy speeds up enough to keep global temperatures below the limits set in the Paris agreement on climate.» - quote from The Economist (see link below)
There's a whole new world to discover and this still new frontier must to be treated with extreme care, wonder and ingenuity.