Ocean energies are categorized to wave energy, tidal energy, and ocean thermal system. Tidal energy is created by gravitational energy of the moon, sun and earth. In fact, the principle of tidal energy is based on the water wheel, and water elevation causes to low and high tides.
France and Russia produce energy of about 400 KW to 240 KW, respectively, and the production potential in the world is approximately 60 GW for generating electricity power. Wave energy is released from conversion of crashing waves’ energy to the shoreline by wind blowing. There are Just 12 types of wave harnessing systems to convert waves to the energy and still researchers are investigating to get high energy Ocean thermal systems as the biggest solar collectors on earth; which can be harnessed to produce energy. These kinds of energies have pros and cons; it depends to looming energy of oceans and seas.