Ocean renewable energy is a multidisciplinary research field and technological domain dedicated to the scientific investigation, engineering development, and practical implementation of methods for capturing and converting energy derived from natural, self-replenishing processes within the marine environment. This concept investigates a range of oceanic energy sources, including but not limited to tidal ranges and currents, wave motion, thermal gradients, and salinity differences, and is characterized by its inherent sustainability, potential for significant scale, and the unique engineering challenges posed by the marine environment. Its significance stems from its capacity to contribute substantially to the global energy supply through clean, renewable sources, thereby supporting climate change mitigation and enhancing energy security.