This new technology, using a design based on a shark or tuna tail, will create electricity from the movement of ocean water. Right now, it’s expensive, but then, all new technology is. Maybe one day it will be available in mass quantities at lower cost. It certainly looks to be low-maintenance and low-impact on the environment.
Hydrogen fuel cells is the way of the future. Governments are investing huge amounts of money into this technology because they can see the long term benefits of using this type of energy.