https://www.facebook.com/bbcnews/videos/10152640238802217/
Looks good on paper.
The power of the oceans in moving tons of water in the tides is hard to grasp. Raising the water level at a beach even an inch involves an amazing amount of energy.
There always were some dreamers who thought of harnessing that power, this looks pretty reasonable.
They've been playing with tidal generated power over here for years now.
http://www.fundytidal.com/
http://fundyforce.ca/
https://www.nrcan.gc.ca/energy/funding/current-funding-programs/cef/4955
It's a good idea. I'm surprised no one seems to have pursued Tesla's theories more, although there are plenty of conspiracy theories.