This page proposes some websites either to discover or to deepen your knowledge on ocean energy, also called marine renewable energy or offshore renewable energy: waves, currents (tidal or ocean currents), tide (tidal energy), ocean thermal energy conversion (OTEC), salinitiy gradient (osmotic pressure), offshore wind, biomass.
To get started, the Ocean Energy glossary, prepared by the Portuguese Wave Energy Centre in the frame of the Coordinated Action on Ocean Energy (CA-OE), European project financed by the 6th Framework-Programme, would be worth a look.
Section in progress (other companies are involved)