Huge potential. Someone should be working on it.
They are in fits and starts. Here is one thread on the topic:
https://discussion.fool.com/australia-wave-energy-project-311227…
"Wave energy is about five to 10 times more expensive than solar and wind, according to Jeff Hansen from the University of Western Australia’s wave energy research centre…
“To engineer things to survive in the marine environment, it takes a lot of effort and they have got to be very robust and I think that’s one of the focuses,” he said. But many renewable energy experts around the world have been sceptical about whether wave energy would be an affordable and reliable source of power for at least 20 years, if ever."
DB2