The real question is if we are changing a very productive system for a not soo good one. Octopuses growth much quicker than strawerries, and are also more expensive. Any aquaculture system in the same area will provide much more human food and better revenues (you are using a 3d volume for production instead a 2d surface).
Marine soil is not apt to cultivate, so you need to put terrestrial soil underwater (or hydroponics), and this is not cheap. There is also a real possibility of contamination of beaches with manure after a storm.
Marine soil is not apt to cultivate, so you need to put terrestrial soil underwater (or hydroponics), and this is not cheap. There is also a real possibility of contamination of beaches with manure after a storm.