With less than 1% of its floor explored, the ocean holds more mystery to mankind than even the surface of the moon.

The deep sea conjures up images of lost cities, fearsome monsters and sunken treasure. But when it comes to the latter, forget about shipwrecks and their precious cargo — infinitely more mineral wealth is believed to lie beneath the sea floor.

BL Premium

This article is reserved for our subscribers.

A subscription helps you enjoy the best of our business content every day along with benefits such as exclusive Financial Times articles, ProfileData financial data, and digital access to the Sunday Times and Sunday Times Daily.

Already subscribed? Simply sign in below.

Questions or problems? Email helpdesk@businesslive.co.za or call 0860 52 52 00. Got a subscription voucher? Redeem it now