A recent report from the European Marine Board looked into the question of whether and how the economic opportunities present in the as yet unexploited deep ocean could be used in a sustainable way. The short answer is, we don't know nearly enough about the deep sea to handle this challenge responsibly. A slightly longer answer is in my latest feature which is out today:
Deep sea in deep trouble?
Current Biology Volume 25, Issue 21, pR1019–R1021, 2 November 2015
A crab observed at 700 metres depth off the coast of Ireland. (Photo: MARUM – Center for Marine Environmental Sciences, University of Bremen.)