Computer science had magnificently positioned the sensor network on earth and on human body but still underwater is unscathed area and our 2/3rdportion of globe is enclosed with seawater. Underwater sensor networks (UWSN) are the emergent and auspicious announcement framework which empowers a wide range of imperative applications. This book mainly focuses on the various energy harvesting techniques for scalable and reliable for data dissemination UWSN. It considered few of the above challenges in the research work. A brief summary of the goal is mentioned below: - Deployment of sensor at three levels in ocean at bottom level which are immobility, then at middle level which are also in mobility and then at top level which are static. - To provide the mechanism to recharge sensor's batteries from natural energy harvesting sources. - The network positioned should be energy efficient. - Data Transmission Rate is fast and high.